As filed with the Securities and Exchange Commission on May 16, 2002
                                            Registration Statement No. 333-85862

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   -----------

                                 AMENDMENT NO. 1
                                       TO
                                    FORM S-3


             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                             WATTS INDUSTRIES, INC.
             (Exact name of registrant as specified in its charter)

              Delaware                                   04-2916536
    (State or other jurisdiction                      (I.R.S. Employer
  of incorporation or organization)                Identification Number)

                                   -----------
                               815 Chestnut Street
                       North Andover, Massachusetts 01845
                                 (978) 688-1811
               (Address, including zip code and telephone number,
        including area code, of Registrant's principal executive offices)

                                   -----------
                             Ronald W. Gorski, Esq.
                               Corporate Attorney
                             Watts Industries, Inc.
                               815 Chestnut Street
                       North Andover, Massachusetts 01845
                                 (978) 688-1811
           (Name, address, including zip code, and telephone number,
                   including area code of agent for service)

                                   -----------
                 Copies of all communications should be sent to:
                              David F. Dietz, P.C.
                           Robert P. Whalen, Jr., P.C.
                               Goodwin Procter LLP
                                 Exchange Place
                        Boston, Massachusetts 02109-2881
                                 (617) 570-1000

                                   -----------
Approximate date of commencement of proposed sale to the public: From time to
time after the effective date of this Registration Statement.

If the only securities being registered on this form are being offered pursuant
to dividend or interest reinvestment plans, please check the following box. |_|

If any of the securities being registered on this form are to be offered on a
delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. |X|

If this Form is filed to register additional securities for an offering pursuant
to Rule 462(b) under the Securities Act, please check the following box and list
the Securities Act registration statement number of the earlier effective
registration statement for the same offering. |_|

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under
the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. |_|

If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. |_|


                                   -----------
The registrant hereby amends this Registration Statement on such date or dates
as may be necessary to delay its effective date until the registrant shall file
a further amendment which specifically states that this Registration Statement
shall thereafter become effective in accordance with Section 8(a) of the
Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the Commission, acting pursuant to Section 8(a), may
determine.

================================================================================



                    Subject to completion. Dated May 16, 2002


PROSPECTUS

    1,200,000 Shares of Class A Common Stock Underlying Class B Common Stock

                             WATTS INDUSTRIES, INC.

                              Class A Common Stock
                           (par value $0.10 per share)

      This prospectus relates to the offer and sale by the selling stockholders
identified in this prospectus, and any of their pledgees, donees, transferees or
other successors in interest, of up to 1,200,000 shares of class A common stock
of Watts Industries, Inc. issuable upon conversion of class B common stock of
Watts Industries, Inc.


      We will not receive any of the proceeds from the sale of the shares of
class A common stock offered by this prospectus. We have agreed to bear the
expenses of registration of the shares under federal and state securities laws.

      Our class A common stock is listed on the New York Stock Exchange under
the symbol "WTS." On May 15, 2002, the last reported sale price of our class A
common stock on the New York Stock Exchange was $19.30.


                                   -----------

      Investing in our class A common stock involves risks. See "Risk Factors"
beginning on page 2 for a discussion of certain factors that you should consider
before you invest in our class A common stock.

                                   -----------

      Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities, or determined if
this prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.

                                   -----------

                The date of this prospectus is ___________, 2002.

                                   -----------

--------------------------------------------------------------------------------
The information in this prospectus is not complete and may be changed. These
securities may not be sold until the registration statement filed with the
Securities and Exchange Commission is effective. This prospectus is not an offer
to sell these securities and it is not soliciting an offer to buy these
securities in any state where the offer or sale is not permitted.
--------------------------------------------------------------------------------


                                TABLE OF CONTENTS


                                                                            Page
                                                                            ----


Prospectus Summary..........................................................   1
Risk Factors................................................................   2
Forward-Looking Statements..................................................   8
Our Company.................................................................   9
Registration Rights of the Selling Stockholders.............................  10
The Selling Stockholders....................................................  11
Use of Proceeds.............................................................  17
Plan of Distribution........................................................  17
Incorporation of Documents by Reference.....................................  19
Where You Can Find More Information.........................................  20
Experts.....................................................................  20
Legal Matters...............................................................  20



                               PROSPECTUS SUMMARY


      This summary represents a summary of all material terms of this offering
and only highlights the more detailed information appearing elsewhere in this
prospectus or incorporated by reference in this prospectus. It may not contain
all of the information that is important to you. You should read this entire
prospectus carefully before deciding whether to invest in our class A common
stock.


      Unless the context otherwise requires, all references to "we," "us" or
"our company" in this prospectus refer collectively to Watts Industries, Inc., a
Delaware corporation, and its subsidiaries, and their respective predecessor
entities for the applicable periods, considered as a single enterprise.

                             Watts Industries, Inc.

      Watts Industries, Inc. designs, manufactures and sells an extensive line
of valves and other products for the water quality, water safety, water flow
control and water conservation markets. We are a leading manufacturer and
supplier of these products in both North America and Europe. Our growth strategy
emphasizes expanding brand preference with customers, focusing on code
development and enforcement, developing new valve products and entering into new
markets for specialized valves and related products through diversification of
its existing business, strategic acquisitions in related business areas, both
domestically and abroad, and continued development of products and services for
the home improvement, do-it-yourself retail market. We have focused on the valve
industry since 1874, when our predecessor was founded to design and produce
steam regulators for New England textile mills and power plants.


      Watts Industries, Inc. is a Delaware corporation. Our class A common stock
is listed on the New York Stock Exchange under the symbol "WTS."


      Our principal executive offices are located at 815 Chestnut Street, North
Andover, Massachusetts 01845, and our telephone number is (978) 688-1811. Our
Internet site address is www.wattsind.com. The information on our web site does
not constitute a part of this prospectus.

                               Recent Developments


      On May 9, 2002, we acquired Hunter Innovations, Inc. of Sacramento,
California for $25 million of which approximately $10 million was paid in cash
at the closing and the balance will be paid out over the next four years. Hunter
Innovations was founded in 1995 as a technology development company and has
developed a patented diaphragm seal technology currently licensed by us for our
backflow prevention product line. Hunter Innovations has also developed a line
of automatic control valves and has made advances in large backflow prevention
device technology. Hunter Innovations' sales during the twelve months preceding
the acquisition were approximately $1.5 million.

      On April 23, 2002, we declared a dividend of $0.06 per share on our class
A and class B common stock payable June 14, 2002 to stockholders of record on
June 3, 2002.

      On April 5, 2002, Gabelli Funds, LLC and its related persons and entities
filed a Schedule 13D reporting beneficial ownership of 6,229,964 shares of class
A common stock, which represents 34.7% of the total outstanding shares of class
A common stock, 23.5% of the total outstanding shares of class A and class B
common stock, and 6.0% of the total voting power of the outstanding class A and
class B common stock.


                                  The Offering


      This prospectus relates to up to an aggregate of 1,200,000 shares of our
class A common stock that may be offered for sale by the selling stockholders.
We originally issued the shares of class B common stock, which are convertible
into the shares of class A common stock to be registered pursuant to this
registration statement, in connection with a recapitalization transaction on
August 28, 1986. In connection with the recapitalization, we entered into a
registration rights agreement with holders of the class B common stock. As of
April 30, 2002, 8,585,224 shares of our class B common stock were outstanding
and subject to subject to this registration rights agreement. If the entire
1,200,000 shares being offered by this prospectus are sold, 7,385,224 shares of
our class B common stock will be outstanding and subject to this registration
rights agreement.


      We are registering the sale of the 1,200,000 shares of class A common
stock covered by this prospectus to fulfill part of our obligations under the
registration rights agreement. Registration of the sale of these shares does not
necessarily mean that all or any portion of the shares will be offered for sale
by the selling stockholders.

      We will not receive any proceeds from the sale of any shares offered by
this prospectus. We have agreed to bear the expenses of registration of the
shares under federal and state securities laws.


                                       1


                                  RISK FACTORS


      An investment in our class A common stock involves a high degree of risk.
The risk factors below represent those risks that we consider to be material to
an investment in our class A common stock and which, if realized, could have
material adverse effects on our business, financial condition or results of
operations as specifically discussed below. In such an event, the trading price
of our class A common stock could decline, and you could lose all or part of
your investment. Before you invest in our class A common stock, you should be
aware of various risks, including those described below. You should carefully
consider these risk factors, together with all of the other information included
or incorporated by reference in this prospectus, before you decide whether to
purchase our class A common stock. The risks and uncertainties described below
are not the only ones we face. This section includes or refers to certain
forward-looking statements. You should refer to the explanation of the
qualifications and limitations on forward-looking statements discussed on page
8.

Down Economic Cycles, Particularly Reduced Levels Of Housing Starts And
Remodeling, Have An Adverse Affect On Our Revenues And Operating Results

      We have experienced and expect to continue to experience fluctuations in
revenues and operating results due to economic and business cycles. The
businesses of most of our customers, particularly plumbing and heating
wholesalers and home improvement retailers, are cyclical. Therefore, the level
of our business activity has been cyclical, fluctuating with economic cycles, in
particular, with housing starts and remodeling levels. Housing starts and
remodeling are, in turn, heavily influenced by mortgage interest rates, consumer
debt levels, changes in disposable income, employment growth, consumer
confidence and, on a short term basis, weather conditions. If these and other
factors cause a material reduction in housing and remodeling starts, our
revenues and profits could decrease and result in a material adverse effect on
our financial condition and results of operations.

We Face The Continuing Impact On Economic And Financial Conditions In The United
States And Around The World As A Result Of The September 11th Terrorist Attacks
And Related Matters, And We Are Predominantly Uninsured For Losses And Business
Interruptions That May Be Caused By Any Additional Terrorist Attacks Or Acts Of
War

      The potential for future terrorist attacks following those of September
11, 2001, the national and international response to such attacks, and other
related acts of war or hostility has exposed us to many general economic and
political uncertainties which may adversely affect our business and results of
operations, and has also exposed us to potentially significant and unpredictable
losses due to the fact that we are predominantly uninsured for losses and
business interruptions that may be caused by terrorist attacks, acts of war and
other related hostilities. Because we operate manufacturing facilities and
participate in joint ventures worldwide, including at locations in the United
States, Canada, Europe and Asia, our business may be adversely impacted by any
such losses or interruptions not only in the United States but in other parts of
the world as well. In addition, any further terrorist attacks or related
hostilities could adversely affect our customers and markets, and could result
in reduced demand for our products that, in turn, could cause a decline in our
revenues and profitability. Such events also could hinder our ability to meet
delivery commitments to our customers through interruptions in our manufacturing
operations, delays on the part of those domestic and international
transportation companies through which we transport our products, or delays
and/or restrictions imposed by increased governmental and industrial security
precautions. An inability to timely meet our delivery obligations could result
in a loss of our customers and could have a negative impact on both our revenues
and profitability.

Economic, Political And Other Risks Associated With International Sales And
Operations Could Adversely Affect Our Business And Future Operating Results

      Since we sell our products worldwide, our business is subject to risks
associated with doing business internationally. Our sales outside North America,
as a percentage of our total sales, was 24.3% in 2001. Accordingly, our business
and future operating results could be harmed by a variety of factors, including:

      o     changes in foreign currency exchange rates which could negatively
            affect our revenues

      o     changes in a specific country's or region's political or economic
            conditions, particularly in emerging markets, which could make it
            difficult for us to meet customer delivery deadlines



                                       2



      o     trade protection measures and import or export licensing
            requirements which could increase our costs of doing business
            internationally

      o     potentially negative consequences from changes in tax laws which
            could have an adverse impact on our profits

      o     difficulty in staffing and managing widespread operations which
            could reduce our productivity

      o     costs of compliance with differing labor regulations

      o     laws of some foreign countries may not protect our intellectual
            property rights to the same extent as the laws of United States

      o     unexpected changes in regulatory requirements which may be costly to
            implement

Reductions Or Interruptions In The Supply Of Raw Materials And Increases In The
Prices Of Raw Materials Could Reduce Our Profit Margins And Adversely Impact Our
Ability To Meet Our Customer Delivery Commitments

      Our inability to obtain adequate supplies of raw materials for our
products at favorable prices, or at all, could have a material adverse effect on
our business, financial condition or results of operations by decreasing our
profit margins and by hindering our ability to timely deliver products to our
customers. We require substantial amounts of raw materials, including bronze,
brass and cast iron, and substantially all raw materials we require are
purchased from outside sources. The availability and prices of raw materials may
be subject to curtailment or change due to, among other things, new laws or
regulations, suppliers' allocations to other purchasers, interruptions in
production by suppliers, changes in exchange rates and worldwide price levels.
We are not currently party to any long-term supply agreements.


Fluctuations In Foreign Exchange Rates Could Materially Affect Our Reported
Results


      Since we report our interim and annual results in United States dollars,
we are subject to the risk of currency fluctuations. Exchange rates between the
United States dollar, in which our results are and will be reported, and the
local currency in the countries in which we provide many of our services, may
fluctuate from quarter to quarter. When the dollar appreciates against the
applicable local currency in any reporting period, the actual earnings generated
by our services in that country are diminished in the conversion.

      We are exposed to fluctuations in foreign currencies as a significant
portion of our revenue, and certain of our costs, assets and liabilities, are
denominated in currencies other than U.S. dollars. Approximately 24.3% of our
revenue during 2001 was from sales outside of North America. For the twelve
months ended December 31, 2001 the depreciation of the euro against the U.S.
dollar had an adverse impact on revenue of $3,385,000, yet the impact on
earnings was minimal. If our share of revenue in non-dollar denominated
currencies continues to increase in future periods, exchange rate fluctuations
will likely have a greater impact on our results of operations and financial
condition.

      In addition, some of our competitors are based in foreign countries and
have cost structures and prices based on foreign currencies. Accordingly,
currency fluctuations could cause our U.S. dollar-priced products to be less
competitive than our competitors' products which are priced in other currencies.

We Face Intense Competition And, If We Are Not Able To Respond To Competition In
Our Markets, Our Revenues May Decrease

      Competitive pressures in our markets could adversely affect our
competitive position, leading to a possible loss of market share or a decrease
in prices, either of which could result in decreased revenues and profits. We
encounter intense competition in all areas of our business. Additionally,
customers for our products are attempting to reduce the number of vendors from
which they purchase in order to reduce the size and diversity of their
inventory. To remain competitive, we will need to invest continuously in
manufacturing, marketing, customer service and support and our distribution
networks. We anticipate that we may have to adjust the prices of some of our
products to stay competitive potentially resulting in a reduction in the profit
margin for, and inventory valuation of, these products. We may not have
sufficient resources to continue to make such investments, and we may be unable
to maintain our competitive position.



                                       3



Environmental Compliance Costs And Liabilities Could Increase Our Expenses Or
Reduce Our Profitability

      We cannot predict the nature, scope or effect of future environmental
regulatory requirements to which our operations might be subject or the manner
in which existing or future environmental laws will be administered or
interpreted, and compliance with such laws or regulations may entail additional
expenses which could decrease our profitability. Our operations and properties
are subject to increasingly stringent laws and regulations relating to
environmental protection, including laws and regulations governing air
emissions, water discharges, waste management and workplace safety. Such laws
and regulations can impose substantial fines and sanctions for violations and
require the installation of costly pollution control equipment or operational
changes to limit pollution emissions and/or decrease the likelihood of
accidental hazardous substance releases. We must conform our operations and
properties to these laws, and adapt to regulatory requirements in all countries
as these requirements change. Violations of these requirements could result in
financial penalties and other enforcement actions. We also could be required to
halt one or more portions of our operations until a violation is cured. Although
we attempt to operate in compliance with these environmental laws, we may not
succeed in this effort at all times. The costs of curing violations or resolving
enforcement actions that might be initiated by government authorities could be
substantial.

      We have experienced, and expect to continue to experience, operating costs
to comply with environmental laws and regulations. In addition, new laws and
regulations, stricter enforcement of existing laws and regulations, the
discovery of previously unknown contamination or the imposition of new clean up
requirements could require us to incur costs or become the basis for new or
increased liabilities that could be significant. While we anticipate that costs
related to environmental liabilities for the remainder of this fiscal year will
be immaterial, environmental litigation, enforcement and compliance is
inherently uncertain and we may experience significant costs in connection with
environmental matters.


Third Parties May Infringe Our Intellectual Property, And We May Expend
Significant Resources Enforcing Our Rights Or Suffer Competitive Injury


      If we fail to successfully enforce our intellectual property rights, our
competitive position could suffer, which could harm our operating results. Our
success depends in part on our proprietary technology. We rely on a combination
of patents, copyrights, trademarks, trade secrets, confidentiality provisions
and licensing arrangements to establish and protect our proprietary rights. We
may be required to spend significant resources to monitor and police our
intellectual property rights.


If We Cannot Continue Operating Our Manufacturing Facilities At Current Or
Higher Levels, Our Results Of Operations Could Be Adversely Affected


      The equipment and management systems necessary for the operation of our
manufacturing facilities may break down, perform poorly or fail, resulting in
fluctuations in our ability to produce our products and to achieve manufacturing
efficiencies. We operate a number of manufacturing facilities, all of which are
subject to this risk, and such fluctuations at any of these facilities could
cause an increase in our production costs and a corresponding decrease in our
profitability. In addition, such fluctuations may affect our ability to deliver
products to our customers on a timely basis, and an inability to timely meet
our delivery obligations could result in a loss of our customers and a resulting
negative impact on our business, financial condition and results of operations.


To The Extent We Are Not Successful In Implementing Our Manufacturing
Restructuring Plan, It Could Have An Adverse Effect On Our Results Of Operations
And Financial Condition


      If our planned manufacturing plant consolidations in the United States and
Europe and production capability expansion in China are not successful, our
results of operations and financial condition could be materially adversely
effected. We believe that this manufacturing restructuring plan will reduce our
product cost. However, if we are unable to meet customer demand, incur increased
transportation costs or have underutilized manufacturing capacity, our results
of operations and financial condition may be harmed.



                                       4



If We Experience Delays In Introducing New Products Or If Our Existing Or New
Products Do Not Achieve Or Maintain Market Acceptance, Our Revenues And Our
Profitability May Decrease

      Failure to develop new and innovative products or to custom design
existing products could result in the loss of existing customers to competitors
or the inability to attract new business, either of which may adversely affect
our revenues. Our industry is characterized by:


      o     intense competition

      o     changes in end-user requirements

      o     technically complex products

      o     evolving product offerings and introductions


      We believe our future success will depend, in part, on our ability to
anticipate or adapt to these factors and to offer, on a timely basis, products
that meet customer demands. The development of new or enhanced products is a
complex and uncertain process requiring the anticipation of technological and
market trends. We may experience design, manufacturing, marketing or other
difficulties, such as an inability to attract a sufficient number of qualified
engineers, that could delay or prevent our development, introduction or
marketing of new products or enhancements and result in unexpected expenses.
Such difficulties could cause us to lose business from our customers and could
adversely affect our competitive position; in addition, added expenses could
decrease the profitability associated with those products that do gain market
acceptance.


Implementation Of Our Acquisition Strategy May Not Be Successful, Which Could
Affect Our Ability To Increase Our Revenues Or Reduce Our Profitability


      One of our strategies is to increase our revenues and expand our markets
through acquisitions that will provide us with complementary water related
products. We cannot be certain that we will be able to identify, acquire or
profitably manage additional companies or successfully integrate such additional
companies without substantial costs, delays or other problems. Also, companies
acquired in the future may not achieve revenues, profitability or cash flows
that justify our investment in them. We expect to spend significant time and
effort in expanding our existing businesses and identifying, completing and
integrating acquisitions. We expect to face competition for acquisition
candidates which may limit the number of acquisition opportunities available to
us and may result in higher acquisition prices, possibly leading to a decrease
in our revenues and profitability. In addition, acquisitions may involve a
number of special risks, including, but not limited to:


      o     adverse short-term effects on our reported operating results

      o     diversion of management's attention

      o     loss of key personnel at acquired companies

      o     unanticipated management or operational problems or legal
            liabilities


If We Fail To Manufacture And Deliver High Quality Products, We May Lose
Customers

      If we fail to maintain and enforce quality control and testing procedures,
our products may not meet the stringent performance and safety standards
demanded by our customers and required by regulatory standards incorporated into
state and municipal plumbing and heating, building and fire protection codes,
possibly harming our reputation and our competitive position in our industry.
Product quality and performance are a priority for our customers. Our products
are used in control of temperature and pressure of water as well as water
quality and safety. These applications require products that meet stringent
performance and safety standards. Substandard products would seriously harm our
reputation resulting in both a loss of current customers to our competitors and
damage to our ability to attract new customers, which could have a material
adverse effect on our revenues and our profitability.



                                       5


We Face Risks From Product Liability And Other Lawsuits, Which May Adversely
Affect Our Business


      We may be subjected to various product liability claims or other lawsuits,
including, among others, that our products include inadequate or improper
instructions for use or installation, or inadequate warnings concerning the
effects of the failure of our products. In the event that we do not have
adequate insurance or contractual indemnification, damages from these claims
would have to be paid from the assets of our company and could have a material
adverse effect on our results of operations, liquidity and financial condition.
In particular, if we settle or conclude litigation in a quarterly or annual
reporting period, there could be a material impact on our operating results for
that quarter or year. We, like other manufacturers and distributors of products
designed to control and regulate fluids, face an inherent risk of exposure to
product liability claims and other lawsuits in the event that the use of our
products results in personal injury, property damage or business interruption to
our customers. Although we maintain strict quality controls and procedures,
including the testing of raw materials and safety testing of selected finished
products, we cannot be certain that our products will be completely free from
defect. In addition, in certain cases, we rely on third-party manufacturers for
our products or components of our products. Although we have product liability
and general insurance coverage, we cannot be certain that this insurance
coverage will continue to be available to us at a reasonable cost, or, if
available, will be adequate to cover any such liabilities.

One Of Our Stockholders Can Exercise Substantial Influence Over Our Company

      As of April 30, 2002, Timothy P. Horne, our Chairman and Chief Executive
Officer beneficially owned 33.0% of our outstanding shares of class A common
stock and class B common stock, which represents 79.1% of the total outstanding
voting power. If the entire 1,200,000 shares being offered by this prospectus
are sold, Mr. Horne will beneficially own 28.8% of our outstanding shares of
class A common stock and class B common stock, or 76.1% of the total outstanding
voting power. As long as Mr. Horne controls shares representing at least a
majority of the total voting power of our outstanding stock, Mr. Horne will be
able to unilaterally determine the outcome of all stockholder votes and other
stockholders will not be able to affect the outcome of any stockholder vote. If
Mr. Horne were to sell a significant amount of common stock into the public
market, the trading price of our class A stock could decline.

Shares Of Our Class A Common Stock Eligible For Public Sale After This Offering
Could Adversely Affect The Market Price Of Our Class A Common Stock

      The market price of our class A common stock could decline as a result of
sales of a large number of shares in the market after this offering or market
perception that such sales could occur, including sales or distributions of
shares by one or more of our large stockholders. These factors could also make
it more difficult for us to raise funds through offerings of equity securities
in the future at a time and at a price that we deem appropriate.

      If the entire 1,200,000 shares being offered by this prospectus are sold,
there will be 19,167,524 shares of our class A common stock and 7,385,224 shares
of our class B common stock outstanding after the completion of this offering. A
substantial majority of the shares of class A common stock, including all of the
shares sold in this offering are freely transferable without restriction or
further registration under the federal securities laws, except for any shares
held by our affiliates, sales of which will be limited by Rule 144 under the
Securities Act of 1933. In addition, under the terms of a registration rights
agreement with respect to outstanding shares of our class B common stock
(7,385,224 shares assuming the sale of all shares of common stock offered by
this prospectus), the holders of our class B common stock have rights with
respect to the registration of these shares under the Securities Act of 1933.
Under these registration rights, these class B common stockholders may require
on two occasions that we register their shares for public resale. If we are
eligible to use Form S-3 or similar short-form registration, these class B
common stockholders may require that we register their shares for public resale
on Form S-3 or similar short-form registration up to two times per year. If we
elect to register any of our shares of common stock for any public offering,
these class B common stockholders are entitled to include shares of common stock
in the registration. However, we may reduce the number of shares proposed to be
registered in view of market conditions. We will pay all expenses in connection
with any registration, other than underwriting discounts and commissions.



                                       6



The Trading Price Of Our Class A Common Stock May Be Volatile And Investors In
Our Class A Common Stock May Experience Substantial Losses

      The trading price of our class A common stock may be volatile and
fluctuations in the trading price may result in substantial losses for
investors. Our class A common stock could decline or fluctuate in response to a
variety of factors, including, but not limited to, our failure to meet the
performance estimates of securities analysts, changes in financial estimates of
our revenues and operating results or buy/sell recommendations by securities
analysts, the timing of announcements by us or our competitors concerning
significant product line developments, contracts or acquisitions or publicity
regarding actual or potential results or performance, fluctuation in our
quarterly operating results caused by fluctuations in revenue and expenses,
substantial sales of our common stock by our existing shareholders, general
stock market conditions, and other economic or external factors.

      In addition, the stock market as a whole has recently experienced extreme
price and volume fluctuations. In the past, securities class action litigation
has often been instituted against companies following periods of volatility in
the market price of their securities. This type of litigation could result in
substantial costs and a diversion of management attention and resources.

Provisions In Our Charter Documents And Delaware Law May Prevent Or Delay
Acquisition Of Us, Which Could Decrease The Value Of Your Shares

      Our certificate of incorporation and bylaws and Delaware law contain
provisions that could make it harder for a third party to acquire us without the
consent of our board of directors. These provisions include those that:

      o     authorize the issuance of up to 5,000,000 shares of preferred stock
            in one or more series without a stockholder vote

      o     limit stockholders' ability to call special meetings

      o     establish advance notice requirements for nominations for election
            to the board of directors or for proposing matters that can be acted
            on by stockholders at stockholder meetings.

      Delaware law also imposes restrictions on mergers and other business
combinations between us and any holder of 15% or more of our outstanding common
stock.

Restrictions In Our Revolving Credit Facility May Limit Our Ability To Pay
Dividends, Incur Additional Debt, And Make Acquisitions And Other Investments

      Our revolving credit facility contains operational and financial covenants
that restrict our ability to make distributions to stockholders, incur
additional debt, and make acquisitions and other investments unless we satisfy
certain financial tests and comply with various financial ratios. If we do not
maintain compliance with these covenants, our creditors could declare a default
under our revolving credit facility, and our indebtedness could be declared
immediately due and payable. Our ability to comply with the provisions of our
revolving credit facility may be affected by changes in economic or business
conditions beyond our control.

The Adoption Of SFAS No. 142 May Result In A Write-Off Of All Or A Portion Of
Our Goodwill Which Would Negatively Impact Our Operating Results And Financial
Condition

      If we are required to take an impairment charge to our goodwill in
connection with the adoption of Statement of Financial Accounting Standards
(SFAS) No. 142, "Goodwill and Other Intangible Assets," our operating results
may decrease and our financial condition may be harmed. As of March 31, 2002, we
had goodwill, net of accumulated amortization, of $126.9 million, or 23.4% of
our total assets and 49.8% of our total stockholders' equity. In accordance with
SFAS No. 142, goodwill and identifiable intangibles assets that have indefinite
useful lives will no longer be amortized. In lieu of amortization, we are
required to perform an initial impairment review of goodwill and annual
impairment reviews thereafter. In connection with the adoption of SFAS No. 142,
we are in the process of evaluating our goodwill for possible impairment. Based
on our evaluations to date, we do not expect any significant impairment nor any
corresponding write offs.



                                       7


                           FORWARD-LOOKING STATEMENTS

      This prospectus, including the information incorporated by reference in
this prospectus, contains forward-looking statements within the meaning of
Section 27A of the Securities Act of 1933 and Section 21E of the Securities
Exchange Act of 1934. All statements, other than statements of historical facts,
included in this prospectus, or in information incorporated by reference in this
prospectus, regarding our strategy, future operations, financial position,
future revenues, projected costs, prospects, plans and objectives of management
are forward-looking statements. The words "anticipates," "believes,"
"estimates," "expects," "predicts," "potential," "intends," "continue," "may,"
"plans," "projects," "will," "should," "could," "would" and similar expressions
are intended to identify forward-looking statements, although not all
forward-looking statements contain these identifying words. We cannot guarantee
that we actually will achieve the plans, intentions or expectations disclosed in
our forward-looking statements, and you should not place undue reliance on our
forward-looking statements. Forward-looking statements are inherently subject to
risks, uncertainties and assumptions. Actual results or events could differ
materially from the plans, intentions and expectations disclosed in the
forward-looking statements that we make. We have included important factors in
the cautionary statements included in this prospectus, particularly under the
heading "Risk Factors," that we believe could cause actual results or events to
differ materially from the forward-looking statements that we make. Our
forward-looking statements do not reflect the potential impact of any future
acquisitions, mergers, dispositions, joint ventures or investments that we may
be a party to or make. We do not assume any obligation to update any
forward-looking statements.


                                       8


                                   OUR COMPANY

      For a more detailed description of our business, please read the
description of our business in our annual report on Form 10-K which is
incorporated by reference in this prospectus.

General

      Watts Industries, Inc. designs, manufactures and sells an extensive line
of valves and other products for the water quality, water safety, water flow
control and water conservation markets. We are a leading manufacturer and
supplier of these products in both North America and Europe. Our growth strategy
emphasizes expanding brand preference with customers, focusing on code
development and enforcement, developing new valve products and entering into new
markets for specialized valves and related products through diversification of
its existing business, strategic acquisitions in related business areas, both
domestically and abroad, and continued development of products and services for
the home improvement, do-it-yourself retail market. We have focused on the valve
industry since 1874, when our predecessor was founded to design and produce
steam regulators for New England textile mills and power plants. Watts
Industries, Inc. was incorporated in Delaware in 1985.

      Our plumbing and heating and water quality product lines include
temperature and pressure safety relief valves; water pressure regulators;
backflow preventers for preventing contamination of potable water caused by
reverse flow within water supply lines and fire protection equipment;
thermostatic mixing valves, ball valves, automatic control valves, water
distribution manifolds, thermostatic radiator valves, check valves, and valves
for water service primarily in residential and commercial environments; metal
and plastic water supply/drainage products including stop valves, tubular brass
products, faucets, drains, sink strainers, compression and flare fittings;
plastic tubing and braided metal hose connectors for residential construction
and home repair and remodeling; drain systems for laboratory drainage and high
purity process installations; water heater seismic-restraint straps, and water
heater stands and enclosures; hydronic and electric radiant heating and snow
melting systems; residential and commercial water filtration and reverse osmosis
systems; and pressure and temperature gauges for use in the HVAC market.

      Within a majority of the product lines we manufacture and market, we
believe that we have one of the broadest product lines in terms of the distinct
designs, sizes and configurations of its valves. Products representing a
majority of our sales have been approved under regulatory standards incorporated
into state and municipal plumbing and heating, building and fire protection
codes, and similar approvals have been obtained from various agencies in the
European market. We have consistently advocated the development and enforcement
of performance and safety standards, and are committed to providing products to
meet these standards, particularly for safety and control valve products. We
maintain quality control and testing procedures at each of our manufacturing
facilities in order to produce products in compliance with code requirements.
Additionally, a majority of our manufacturing subsidiaries have either acquired
or are working to acquire ISO 9000, 9001 or 9002 certification from the
International Organization for Standardization (ISO).

Recent Developments


      On May 9, 2002, we acquired Hunter Innovations, Inc. of Sacramento,
California for $25 million of which approximately $10 million was paid in cash
at the closing and the balance will be paid out over the next four years. Hunter
Innovations was founded in 1995 as a technology development company and has
developed a patented diaphragm seal technology currently licensed by us for our
backflow prevention product line. Hunter Innovations has also developed a line
of automatic control valves and has made advances in large backflow prevention
device technology. Hunter Innovations' sales during the twelve months preceding
the acquisition were approximately $1.5 million.

      On April 23, 2002, we declared a dividend of $0.06 per share on our class
A and class B common stock payable June 14, 2002 to stockholders of record on
June 3, 2002.

      On April 5, 2002, Gabelli Funds, LLC and its related persons and entities
filed a Schedule 13D reporting beneficial ownership of 6,229,964 shares of class
A common stock, which represents 34.7% of the total outstanding shares of class
A common stock, 23.5% of the total outstanding shares of class A and class B
common stock, and 6.0% of the total voting power of the outstanding class A and
class B common stock.



                                       9


                     REGISTRATION RIGHTS OF THE SELLING STOCKHOLDERS

      The following is a summary of the material terms and provisions of the
registration rights agreement between us and the selling stockholders. It may
not contain all of the information that is important to you. You can access
complete information by referring to the registration rights agreement which is
filed as an exhibit to the registration statement of which this prospectus is a
part.

      We are filing this registration statement under the terms of the
registration rights agreement. Under the registration rights agreement, we must
use our best efforts to cause the registration statement to be declared
effective by the Securities and Exchange Commission, and we must keep the
registration statement continuously effective for the period necessary to
complete the offering of up to 1,200,000 shares of class A common stock pursuant
to this prospectus.


      The registration rights agreement allows us to suspend the selling
stockholders' use of this prospectus in some circumstances, such as to permit us
to correct or update this prospectus or the registration statement of which this
prospectus is a part. Any shares of class A common stock sold by the selling
stockholders pursuant to this prospectus will no longer be entitled to the
benefits of the registration rights agreement. We have agreed to bear the
expenses of registering the sale of the shares of class A common stock by the
selling stockholders.


      Under the registration rights agreement, we have agreed to indemnify the
following persons against all claims, losses, damages and liabilities, including
legal and other expenses incurred in investigating or defending against any
claims, arising out of an untrue statement of material fact contained in the
registration statement or this prospectus, or any omission to state in the
registration statement or this prospectus a material fact required to be stated
herein or in the registration statement or necessary to make the statements
herein or in the registration statement not misleading, or arising out of any
violation by us of federal or state securities laws, subject to limitations
specified in the registration rights agreement:

      o     the selling stockholders;

      o     any underwriter of an offering registered on a registration
            statement; and

      o     any person who controls a selling stockholder or an underwriter.

      In addition, each selling stockholder has agreed to indemnify us, our
officers and directors, any underwriter, any person who controls our company or
an underwriter, and the other selling stockholders against all claims, losses,
damages, liabilities and expenses which result from an untrue statement or
omission in the information furnished to us in writing by such selling
stockholder for use in the registration statement or prospectus.


                                       10


                            THE SELLING STOCKHOLDERS


   The following table sets forth the number of shares of common stock
beneficially owned by the selling stockholders as of April 30, 2002, the number
of shares of class A common stock covered by this prospectus and the total
number of shares of common stock that the selling stockholders will beneficially
own upon completion of this offering. This table assumes that the selling
stockholders will offer for sale all of the shares of class A common stock
covered by this prospectus.

   The class A common stock offered by this prospectus may be offered from time
to time by the selling stockholders named below, or by any of their pledgees,
donees, transferees or other successors in interest. The amounts set forth below
are based upon information provided to us by representatives of the selling
stockholders, or on our records, as of April 30, 2002 and are accurate to the
best of our knowledge. It is possible, however, that the selling stockholders
may acquire or dispose of additional shares of common stock from time to time
after the date of this prospectus.



                                                                                 Common Stock Beneficially
                                                                                Owned After the Offering(4)
                                  Number of Shares                              ---------------------------
                                    Beneficially            Number of                           Percent
                                     Owned as of              Shares                            -------
Name(2)                          April 30, 2002(1)(3)     Offered Hereby        Shares       Equity    Voting
-------                          --------------------     --------------        ------       ------    ------

                                                                                         
Timothy P. Horne (5)(6)             8,914,007(7)(8)(9)       500,000(10)     7,774,007(11)    28.8%     76.1%

George B. Horne Trust,
   u/d/t January 26, 1982 (6)       2,074,600(12)            300,000(10)     1,774,600(13)     6.7      19.1

Daniel W. Horne Trust,
   u/d/t February 5, 1980 (6)       1,337,490(14)            100,000(10)     1,237,490(15)     4.7      13.0

Deborah Horne Trust,
   u/d/t September 10, 1976 (6)     1,337,490(16)            100,000(10)     1,237,490(17)     4.7      13.0

Peter W. Horne Trust,
   u/d/t September 10, 1976 (6)     1,286,315(18)            100,000(10)     1,186,315(19)     4.5      12.3

Tiffany Rae Horne Trust,
   u/d/t August 7, 1984               230,340(20)             60,000(10)       170,340(21)      *        1.8

Tara V. Horne (6)                      70,200(22)             40,000(10)        30,200(23)      *         *

TOTAL                               9,225,522(24)          1,200,000(10)     8,025,522(25)    29.7%     78.3%



--------------
*     Represents beneficial ownership of less than one percent of outstanding
      common stock.


(1)   The number of shares and percentages have been determined as of April 30,
      2002 in accordance with Rule 13d-3 of the Securities Exchange Act of 1934.
      At that date, a total of 26,552,748 shares were outstanding, of which
      8,585,224 were shares of class B common stock and 17,967,524 were shares
      of class A common stock. Each share of class A common stock is entitled to
      one vote per share and each share of class B common stock is entitled to
      ten votes per share. Each share of class B common stock is convertible
      into one share of class A common stock. Shares of class A common stock are
      not convertible. The table's equity percentages reflect the applicable
      beneficial owner's combined class A common stock and class B common stock
      holdings divided by the total number of outstanding shares of both
      classes. The table's voting percentage reflects the applicable beneficial
      owner's one vote per share of class A common stock plus ten votes per
      share of class B common stock divided by the total number of votes.



                                       11


(2)   The address of each stockholder in the table is c/o Watts Industries,
      Inc., 815 Chestnut Street, North Andover, Massachusetts 01845.


(3)   Under the rules promulgated by the Securities and Exchange Commission,
      beneficial ownership includes any shares as to which the stockholder has
      sole or shared voting power or investment power and includes any shares as
      to which the stockholder has the right to acquire beneficial ownership
      within 60 days after April 30, 2002. Unless otherwise indicated, each
      stockholder has sole voting and investment power with respect to shares
      beneficially owned by that stockholder. For purposes of computing the
      equity and voting percentages for each stockholder, any shares that such
      stockholder has the right to acquire within 60 days of April 30, 2002 are
      deemed to be outstanding, but are not deemed to be outstanding for the
      purpose of computing the percentages for any other stockholder.


(4)   Assumes that the selling stockholders will sell all shares of common stock
      offered by them under this prospectus.

(5)   Selling stockholder is Chairman of the Board, Chief Executive Officer,
      President and a Director of Watts Industries, Inc.

(6)   Timothy P. Horne, George B. Horne, Daniel W. Horne, Deborah Horne, Peter
      W. Horne, Tara V. Horne, and Daniel J. Murphy III may be deemed a "group"
      as that term is used in Section 13(d)(3) of the Securities Exchange Act of
      1934.


(7)   Includes (i) 2,201,220 shares of class B common stock and 250,211 shares
      of class A common stock beneficially owned by Timothy P. Horne (for
      purposes of this footnote, "Mr. Horne"), (ii) 1,335,840 shares held for
      the benefit of Daniel W. Horne, Mr. Horne's brother, under a revocable
      trust for which Mr. Horne serves as sole trustee, (iii) 1,335,840 shares
      held for the benefit of Deborah Horne, Mr. Horne's sister, under a trust
      for which Mr. Horne serves as sole trustee, which trust is revocable with
      the consent of the trustee, (iv) 1,185,840 shares held for the benefit of
      Peter W. Horne, Mr. Horne's brother, under a revocable trust for which
      Peter W. Horne serves as sole trustee, (v) 2,074,600 shares held for the
      benefit of George B. Horne, Mr. Horne's father, under a revocable trust
      for which Mr. Horne serves as co-trustee, (vi) 40,000 shares owned by Tara
      V. Horne, Mr. Horne's daughter, (vii) 30,200 shares held for the benefit
      of Tara V. Horne, under an irrevocable trust for which Mr. Horne serves as
      trustee, (viii) 22,600 shares held for the benefit of Tiffany R. Horne,
      Mr. Horne's daughter, under an irrevocable trust for which Mr. Horne
      serves as trustee, and (ix) 437,656 shares issuable upon the exercise of
      stock options or upon the conversion of restricted stock units that are
      exercisable currently or within 60 days of April 30, 2002. The shares
      noted in clause (iv) are held in a voting trust for which Mr. Horne and
      Daniel J. Murphy, III serve as co-trustees. See footnote 9. 2,201,220 of
      the shares of class B common stock noted in clause (i), 1,285,840 of the
      shares of class B common stock noted in clause (ii), 1,285,840 of the
      shares of class B common stock noted in clause (iii), 2,024,600 of the
      shares of class B common stock noted in clause (v), and all of the 92,800
      shares of class B common stock noted in clauses (vi), (vii) and (viii)
      (6,890,300 shares in the aggregate) are held in a voting trust for which
      Mr. Horne serves as trustee. See footnote 8. All shares beneficially owned
      or which may be deemed beneficially owned by Mr. Horne are class B common
      stock except 250,211 of the shares noted in clause (i), 25,000 of the
      shares noted in each of clauses (ii) and (iii), and all of the shares
      noted in clause (ix) of this footnote.

(8)   6,890,300 shares of class B common stock in the aggregate (see footnote 7)
      (5,850,300 shares of class B common stock in the aggregate assuming the
      sale of all shares of common stock offered by this prospectus (see
      footnote 11)) are subject to the terms of The Amended and Restated George
      B. Horne Voting Trust Agreement-1997 ("the 1997 Voting Trust"). Under the
      terms of the 1997 Voting Trust, the trustee (currently Timothy P. Horne)
      has sole power to vote all shares subject to the 1997 Voting Trust.
      Timothy P. Horne, for so long as he is serving as trustee of the 1997
      Voting Trust, has the power to determine in his sole discretion whether or
      not proposed actions to be taken by the trustee of the 1997 Voting Trust
      shall be taken, including the trustee's right to authorize the withdrawal
      of shares from the 1997 Voting Trust (for purposes of this footnote, the
      "Determination Power"). In the event that Timothy P. Horne ceases to serve
      as trustee of the



                                       12


      1997 Voting Trust, no trustee thereunder shall have the Determination
      Power except in accordance with a duly adopted amendment to the 1997
      Voting Trust. Under the terms of the 1997 Voting Trust, in the event that
      Timothy P. Horne ceases to serve as trustee of the 1997 Voting Trust, then
      Daniel J. Murphy III, a director of the Company, David F. Dietz, whose
      professional corporation is a partner in the law firm of Goodwin Procter
      LLP, and Walter J. Flowers, a partner in the law firm of Flowers and
      Manning LLP (each, a "Successor Trustee" and collectively, the "Successor
      Trustees"), shall thereupon become co-trustees of the 1997 Voting Trust.
      If a Successor Trustee shall cease to serve as such for any reason, then a
      third person shall become a co-trustee with the remaining two Successor
      Trustees, in accordance with the following line of succession: first, any
      individual designated as the Primary Designee, next, any individual
      designated as the Secondary Designee, and then, an individual appointed by
      the holders of a majority in interest of the voting trust certificates
      then outstanding. In the event that the Successor Trustees do not
      unanimously concur on any matter not specifically contemplated by the
      terms of the 1997 Voting Trust, the vote of a majority of the Successor
      Trustees shall be determinative.

      The 1997 Voting Trust expires on August 26, 2021, subject to extension on
      or after August 26, 2019 by stockholders (including the trustee of any
      trust stockholder, whether or not such trust is then in existence) who
      deposited shares of class B common stock in the 1997 Voting Trust and are
      then living or, in the case of shares in the 1997 Voting Trust the
      original depositor of which (or the trustee of the original depositor of
      which) is not then living, the holders of voting trust certificates
      representing such shares. The 1997 Voting Trust may be amended by vote of
      the holders of a majority of the voting trust certificates then
      outstanding and by the number of trustees authorized to take action at the
      relevant time or, if the trustees (if more than one) do not concur with
      respect to any proposed amendment at any time when any trustee holds the
      Determination Power, then by the trustee having the Determination Power.
      Amendments to the extension, termination and amendment provisions of the
      1997 Voting Trust require the approval of each individual depositor.
      Shares may not be removed from the 1997 Voting Trust during its term
      without the consent of the requisite number of trustees required to take
      action under the 1997 Voting Trust. Voting trust certificates are subject
      to any restrictions on transfer applicable to the stock which they
      represent.


      Timothy P. Horne holds 31.94% (29.08% assuming the sale of all shares of
      common stock offered by this prospectus) of the total beneficial interest
      in the 1997 Voting Trust (the "Beneficial Interest") individually, 18.66%
      (20.27% assuming the sale of all shares of common stock offered by this
      prospectus) of the Beneficial Interest as trustee of a revocable trust,
      18.66% (20.27% assuming the sale of all shares of common stock offered by
      this prospectus) of the Beneficial Interest as trustee of a trust
      revocable with the consent of the trustee, 29.38% (29.48% assuming the
      sale of all shares of common stock offered by this prospectus) of the
      Beneficial Interest as co-trustee of a revocable trust, and 0.44% (0.52%
      assuming the sale of all shares of common stock offered by this
      prospectus) and 0.33% (0.39% assuming the sale of all shares of common
      stock offered by this prospectus) of the Beneficial Interest as trustee of
      two irrevocable trusts (representing an aggregate of 99.42%, or 100%
      assuming the sale of all shares of common stock offered by this
      prospectus, of the Beneficial Interest). George B. Horne holds 29.38%
      (29.48% assuming the sale of all shares of common stock offered by this
      prospectus) of the Beneficial Interest as co-trustee of a revocable trust.
      Tara V. Horne, individually and as beneficiary of an irrevocable trust
      holds 1.02% (0.52% assuming the sale of all shares of common stock offered
      by this prospectus) of the Beneficial Interest. Tiffany R. Horne as
      beneficiary of an irrevocable trust holds 0.33% (0.39% assuming the sale
      of all shares of common stock offered by this prospectus) of the
      Beneficial Interest.


(9)   Includes 1,185,840 shares of class B common stock (1,085,840 shares of
      class B common stock assuming the sale of all shares of common stock
      offered by this prospectus) that are beneficially owned by Peter W. Horne,
      as sole trustee and beneficiary of a revocable trust. The shares are
      subject to the terms of the Horne Family Voting Trust Agreement - 1991
      (the "1991 Voting Trust"). Under the terms of the 1991 Voting Trust, the
      two trustees (currently Timothy P. Horne and Daniel J. Murphy, III) have
      sole power to vote all shares subject to the 1991 Voting Trust. However,
      as long as Timothy P. Horne is serving as a trustee of the 1991 Voting
      Trust, Timothy P. Horne generally has the right to vote all shares subject
      to such trust in the event that the trustees do not concur with respect to
      any proposed action, including any exercise of the trustee's right to
      authorize the withdrawal of shares from the 1991 Voting Trust (for
      purposes of this footnote, the "Determination Power"). The sole exception
      to the Determination Power is that the concurrence of Timothy P. Horne and
      Daniel J. Murphy, III is required for the voting of shares in connection
      with any vote involving the election or removal of directors of the
      Company. Under the terms of the 1991 Voting Trust, Timothy P. Horne has
      the authority to designate up to two successor trustees. Timothy P. Horne
      has not designated any such successor trustee. If each of Timothy P. Horne
      and

                                       13


      Daniel J. Murphy, III ceases to serve as a trustee for any reason, and no
      successor trustee has been designated, the holders of a majority of the
      voting trust certificates then outstanding have the right to designate
      successor trustees as necessary under the terms of the 1991 Voting Trust.
      Under the terms of the 1991 Voting Trust, Timothy P. Horne and George B.
      Horne, the father of Timothy P. Horne, can collectively agree to revoke
      the designation of any successor trustee before he begins to serve or to
      appoint a new designated successor. If one of such Horne family member is
      unable to take such action, this power rests in the survivor of them. The
      1991 Voting Trust was scheduled to expire on October 31, 2001, but the
      term of the 1991 Voting Trust was extended for one year by directive of
      the sole beneficiary, Peter W. Horne. The 1991 Voting Trust now expires on
      October 31, 2002, subject to extension on or before October 31, 2002 by
      stockholders (including the trustee of any trust stockholder, whether or
      nor such trust is then in existence) who deposited shares of class B
      common stock in the 1991 Voting Trust, are then living, and continue to
      hold voting trust certificates under the 1991 Voting Trust or, in the case
      of shares in the 1991 Voting Trust the original depositor of which (or the
      trustee of the original depositor of which) is not then living, the
      holders of voting trust certificates representing such shares. The 1991
      Voting Trust may be amended or terminated by vote of the holders of a
      majority of the voting trust certificates then outstanding and, while one
      or more of Timothy P. Horne, Daniel J. Murphy, III and their successors
      designated as described in the preceding paragraph is serving as trustee,
      the trustees. Shares may not be removed from the 1991 Voting Trust during
      its term without the consent of the trustees.

(10)  Represents shares of class A common stock issuable upon conversion of
      class B common stock.


(11)  Includes (i) 1,701,220 shares of class B common stock and 250,211 shares
      of class A common stock beneficially owned by Timothy P. Horne (for
      purposes of this footnote, "Mr. Horne"), (ii) 1,235,840 shares held for
      the benefit of Daniel W. Horne, Mr. Horne's brother, under a revocable
      trust for which Mr. Horne serves as sole trustee, (iii) 1,235,840 shares
      held for the benefit of Deborah Horne, Mr. Horne's sister, under a trust
      for which Mr. Horne serves as sole trustee, which trust is revocable with
      the consent of the trustee, (iv) 1,085,840 shares held for the benefit of
      Peter W. Horne, Mr. Horne's brother, under a revocable trust for which
      Peter W. Horne serves as sole trustee, (v) 1,774,600 shares held for the
      benefit of George B. Horne, Mr. Horne's father, under a revocable trust
      for which Mr. Horne serves as co-trustee, (vi) 30,200 shares held for the
      benefit of Tara V. Horne, under an irrevocable trust for which Mr. Horne
      serves as trustee, (vii) 22,600 shares held for the benefit of Tiffany R.
      Horne, Mr. Horne's daughter, under an irrevocable trust for which Mr.
      Horne serves as trustee, and (viii) 437,656 shares issuable upon the
      exercise of stock options or upon the conversion of restricted stock units
      that are exercisable currently or within 60 days of April 30, 2002. The
      shares noted in clause (iv) are held in a voting trust for which Mr. Horne
      and Daniel J. Murphy, III serve as co-trustees. See footnote 9. 1,701,220
      of the shares of class B common stock noted in clause (i), 1,185,840 of
      the shares of class B common stock noted in clause (ii), 1,185,840 of the
      shares of class B common stock noted in clause (iii), 1,724,600 of the
      shares of class B common stock noted in clause (v), and all of the 52,800
      shares of class B common stock noted in clauses (vi) and (vii) (5,850,300
      shares in the aggregate) are held in a voting trust for which Mr. Horne
      serves as trustee. See footnote 8. All shares beneficially owned or which
      may be deemed beneficially owned by Mr. Horne are class B common stock
      except 250,211 of the shares noted in clause (i), 25,000 of the shares
      noted in each of clauses (ii) and (iii), and all of the shares noted in
      clause (viii) of this footnote.


(12)  All shares are class B common stock. Consists of 2,074,600 shares held in
      a revocable trust for which Timothy P. Horne and George B. Horne serve as
      co-trustees. 2,024,600 of such shares are subject to the 1997 Voting
      Trust. See footnote 8.

(13)  All shares are class B common stock. Consists of 1,774,600 shares held in
      a revocable trust for which Timothy P. Horne and George B. Horne serve as
      co-trustees. 1,724,600 of such shares are subject to the 1997 Voting
      Trust. See footnote 8.

(14)  All shares are class B common stock, except for 26,650 shares of class A
      common stock. All shares, except for 1,650 shares of class A common stock,
      are held in a revocable trust for which Timothy P. Horne serves as sole
      trustee. 1,285,840 of the class B common stock shares are subject to the
      1997 Voting Trust. See footnote 8.

(15)  All shares are class B common stock, except for 26,650 shares of class A
      common stock. All shares, except for 1,650 shares of class A common stock,
      are held in a revocable trust for which Timothy P. Horne serves as sole
      trustee. 1,185,840 of the class B common stock shares are subject to the
      1997 Voting Trust. See footnote 8.


                                       14


(16)  All shares are class B common stock, except for 26,650 shares of class A
      common stock. All shares, except for 1,650 shares of class A common stock,
      are held in a trust for which Timothy P. Horne serves as sole trustee,
      which trust is revocable with the consent of the trustee. 1,285,840 of the
      class B common stock shares are subject to the 1997 Voting Trust. See
      footnote 8.

(17)  All shares are class B common stock, except for 26,650 shares of class A
      common stock. All shares, except for 1,650 shares of class A common stock,
      are held in a trust for which Timothy P. Horne serves as sole trustee,
      which trust is revocable with the consent of the trustee. 1,185,840 of the
      class B common stock shares are subject to the 1997 Voting Trust. See
      footnote 8.

(18)  All shares are class B common stock except for 50,475 shares of class A
      common stock. The shares of class B common stock are held in a revocable
      trust for which Peter W. Horne serves as sole trustee. 1,185,840 of the
      class B common stock shares are subject to the 1991 Voting Trust. See
      footnote 9.

(19)  All shares are class B common stock except for 50,475 shares of class A
      common stock. The shares of class B common stock are held in a revocable
      trust for which Peter W. Horne serves as sole trustee. 1,085,840 of the
      class B common stock shares are subject to the 1991 Voting Trust. See
      footnote 9.

(20)  All shares are class B common stock. 207,740 shares of class B common
      stock are held in a trust for which Walter J. Flowers, a partner in the
      law firm of Flowers and Manning LLP serves as trustee. 22,600 shares of
      the class B common stock are held in an irrevocable trust for which
      Timothy P. Horne serves as trustee, and are subject to the 1997 Voting
      Trust. See footnote 8.

(21)  All shares are class B common stock. 147,740 shares of class B common
      stock are held in a trust for which Walter J. Flowers, a partner in the
      law firm of Flowers and Manning LLP serves as trustee. 22,600 shares of
      the class B common stock are held in an irrevocable trust for which
      Timothy P. Horne serves as trustee, and are subject to the 1997 Voting
      Trust. See footnote 8.

(22)  All shares are class B common stock. 40,000 shares are owned individually
      by Tara V. Horne and 30,200 shares of the class B common stock are held in
      an irrevocable trust for which Timothy P. Horne serves as trustee. All of
      the shares are subject to the 1997 Voting Trust. See footnote 8.

(23)  All shares are class B common stock held in an irrevocable trust for which
      Timothy P. Horne serves as trustee, and are subject to the 1997 Voting
      Trust. See footnote 8.


(24)  Includes (i) 2,201,220 shares of class B common stock and 250,211 shares
      of class A common stock beneficially owned by Timothy P. Horne, (ii)
      1,335,840 shares held for the benefit of Daniel W. Horne under a revocable
      trust and 1,650 shares owned by Daniel W. Horne, (iii) 1,335,840 shares
      held for the benefit of Deborah Horne under a trust which is revocable
      with the consent of the trustee and 1,650 shares owned by Deborah Horne,
      (iv) 1,235,840 shares held for the benefit of Peter W. Horne under a
      revocable trust and 50,475 shares owned by Peter W. Horne, (v) 2,074,600
      shares held for the benefit of George B. Horne under a revocable trust,
      (vi) 40,000 shares owned by Tara V. Horne, (vii) 30,200 shares held for
      the benefit of Tara V. Horne under an irrevocable trust, (viii) 22,600
      shares held for the benefit of Tiffany R. Horne under an irrevocable
      trust, (ix) 207,740 shares held in a trust for the benefit of Tiffany Rae
      Horne, and (x) 437,656 shares issuable upon the exercise of stock options
      or upon the conversion of restricted stock units that are exercisable by
      Timothy P. Horne currently or within 60 days of April 30, 2002. 1,185,840
      of the shares of class B common stock noted in clause (iv) are held in a
      voting trust for which Timothy P. Horne and Daniel J. Murphy, III serve as
      co-trustees. See footnote 9. 2,201,220 of the shares of class B common
      stock noted in clause (i), 1,285,840 of the shares of class B common stock
      noted in clause (ii), 1,285,840 of the shares of class B common stock
      noted in clause (iii), 2,024,600 of the shares of class B common stock
      noted in clause (v), and all of the 92,800 shares of class B common stock
      noted in clauses (vi), (vii) and (viii) (6,890,300 shares in the
      aggregate) are held in a voting trust for which Mr. Horne serves as
      trustee. See footnote 8. All shares beneficially owned or which may be
      deemed beneficially owned by the selling stockholders are class B common
      stock except 250,211 of the shares noted in clause (i), 26,650 of the
      shares noted in each of clauses (ii) and (iii), 50,475 of the shares noted
      in clause (iv) and all of the shares noted in clause (x) of this footnote.

(25)  Includes (i) 1,701,220 shares of class B common stock and 250,211 shares
      of class A common stock beneficially owned by Timothy P. Horne, (ii)
      1,235,840 shares held for the benefit of Daniel W. Horne under a revocable
      trust



                                       15



      and 1,650 shares owned by Daniel W. Horne, (iii) 1,235,840 shares held for
      the benefit of Deborah Horne under a trust which is revocable with the
      consent of the trustee and 1,650 shares owned by Deborah Horne, (iv)
      1,135,840 shares held for the benefit of Peter W. Horne under a revocable
      trust and 50,475 shares owned by Peter W. Horne, (v) 1,774,600 shares held
      for the benefit of George B. Horne under a revocable trust, (vi) 30,200
      shares held for the benefit of Tara V. Horne under an irrevocable trust,
      (vii) 22,600 shares held for the benefit of Tiffany R. Horne under an
      irrevocable trust, (viii) 147,740 shares held in a trust for the benefit
      of Tiffany Rae Horne, and (ix) 437,656 shares issuable upon the exercise
      of stock options or upon the conversion of restricted stock units that are
      exercisable by Timothy P. Horne currently or within 60 days of April 30,
      2002. 1,085,840 of the shares of class B common stock noted in clause (iv)
      are held in a voting trust for which Timothy P. Horne and Daniel J.
      Murphy, III serve as co-trustees. See footnote 9. 1,701,220 of the shares
      of class B common stock noted in clause (i), 1,185,840 of the shares of
      class B common stock noted in clause (ii), 1,185,840 of the shares of
      class B common stock noted in clause (iii), 1,724,600 of the shares of
      class B common stock noted in clause (v), and all of the 52,800 shares of
      class B common stock noted in clauses (vi) and (vii) (5,850,300 shares in
      the aggregate) are held in a voting trust for which Mr. Horne serves as
      trustee. See footnote 8. All shares beneficially owned or which may be
      deemed beneficially owned by the selling stockholders are class B common
      stock except 250,211 of the shares noted in clause (i), 26,650 of the
      shares noted in each of clauses (ii) and (iii), 50,475 of the shares noted
      in clause (iv) and all of the shares noted in clause (ix) of this
      footnote.



                                       16


                                 USE OF PROCEEDS

      We will not receive any proceeds from the sale by the selling stockholders
of the class A common stock covered by this prospectus.


                              PLAN OF DISTRIBUTION

      The selling stockholders, or their pledgees, donees, transferees, or any
of their successors in interest, may sell the securities from time to time on
the New York Stock Exchange or any other stock exchange or automated interdealer
quotation system on which the securities are listed, in the over-the-counter
market, in privately negotiated transactions or otherwise, at fixed prices that
may be changed, at market prices prevailing at the time of sale, at prices
related to prevailing market prices or at prices otherwise negotiated. The
"selling stockholders" as used in this section of the prospectus shall refer to
the selling stockholders, or their pledgees, donees, transferees, or any of
their successors in interest. The selling stockholders may sell the securities
by one or more of the following methods, without limitation:

      o     block trades in which the broker or dealer so engaged will attempt
            to sell the securities as agent but may position and resell a
            portion of the block as principal to facilitate the transaction;

      o     purchases by a broker or dealer as principal and resale by the
            broker or dealer for its own account pursuant to this prospectus;

      o     a special offering, an exchange distribution or a secondary
            distribution in accordance with the rules of any stock exchange on
            which the securities are listed;

      o     ordinary brokerage transactions and transactions in which the broker
            solicits purchases;

      o     privately negotiated transactions;

      o     short sales;

      o     through the writing of options on the securities, whether or not the
            options are listed on an options exchange;

      o     through the distribution of the securities by any selling
            stockholder to its partners, members or stockholders;

      o     one or more underwritten offerings on a firm commitment or best
            efforts basis;

      o     sales at other than a fixed price to or through a market maker or
            into an existing trading market, on an exchange or otherwise, for
            such securities;

      o     through agreements between a broker or dealer and one or more of the
            selling stockholders to sell a specified number of the securities at
            a stipulated price per share; and

      o     any combination of any of these methods of sale.

      The selling stockholders may also transfer the securities by gift. We do
not know of any arrangements by the selling stockholders for the sale of any of
the securities.

      The selling stockholders may arrange for other brokers or dealers to
participate in effecting sales of the securities. These brokers, dealers or
underwriters may act as principals, or as an agent of a selling stockholder.
Broker-dealers may agree with a selling stockholder to sell a specified number
of the securities at a stipulated price per security. If the broker-dealer is
unable to sell securities acting as agent for a selling stockholder, it may
purchase as principal any unsold securities at the stipulated price.
Broker-dealers who acquire securities as principals may thereafter resell the
securities from time to time in transactions in any stock exchange or automated
interdealer quotation system on which the securities are then listed, at prices
and on terms then prevailing at the time of sale, at prices related to the
then-current market price or in negotiated transactions. Broker-dealers may use
block transactions and sales to and through broker-dealers, including


                                       17


transactions of the nature described above. Broker-dealers will receive
commissions or other compensation from the selling stockholders in amounts to be
negotiated immediately prior to the sale that will not exceed those customary in
the types of transactions involved. Broker-dealers may also receive compensation
from purchasers of the securities which is not expected to exceed that customary
in the types of transactions involved. The selling stockholders may also sell
the securities in accordance with Rule 144 under the Securities Act of 1933, as
amended, rather than pursuant to this prospectus, regardless of whether the
securities are covered by this prospectus.

      From time to time, one or more of the selling stockholders may pledge,
hypothecate or grant a security interest in some or all of the securities owned
by them. The pledgees, secured parties or persons to whom the securities have
been hypothecated will, upon foreclosure in the event of default, be deemed to
be selling stockholders. The number of a selling stockholder's securities
offered under this prospectus will decrease as and when it takes such actions.
The plan of distribution for that selling stockholder's securities will
otherwise remain unchanged. In addition, a selling stockholder may, from time to
time, sell the securities short, and, in those instances, this prospectus may be
delivered in connection with the short sales and the securities offered under
this prospectus may be used to cover short sales.

      To the extent required under the Securities Act of 1933, the aggregate
amount of selling stockholders' securities being offered and the terms of the
offering, the names of any agents, brokers, dealers or underwriters and any
applicable commission with respect to a particular offer will be set forth in an
accompanying prospectus supplement. Any underwriters, dealers, brokers or agents
participating in the distribution of the securities may receive compensation in
the form of underwriting discounts, concessions, commissions or fees from a
selling stockholder and/or purchasers of a selling stockholder's securities, for
whom they may act (which compensation as to a particular broker-dealer might be
in excess of customary commissions).

      The selling stockholders and any underwriters, brokers, dealers or agents
that participate in the distribution of the securities may be deemed to be
"underwriters" within the meaning of the Securities Act of 1933, and any
discounts, concessions, commissions or fees received by them and any profit on
the resale of the securities sold by them may be deemed to be underwriting
discounts and commissions.

      A selling stockholder may enter into hedging transactions with
broker-dealers and the broker-dealers may engage in short sales of the
securities in the course of hedging the positions they assume with that selling
stockholder, including, without limitation, in connection with distributions of
the securities by those broker-dealers. A selling stockholder may enter into
option or other transactions with broker-dealers that involve the delivery of
the securities offered hereby to the broker-dealers, who may then resell or
otherwise transfer those securities. A selling stockholder may also loan or
pledge the securities offered hereby to a broker-dealer and the broker-dealer
may sell the securities offered hereby so loaned or upon a default may sell or
otherwise transfer the pledged securities offered hereby.

      The selling stockholders and other persons participating in the sale or
distribution of the securities will be subject to applicable provisions of the
Securities Exchange Act of 1934, as amended, and the rules and regulations
thereunder, including Regulation M. This regulation may limit the timing of
purchases and sales of any of the securities by the selling stockholders and any
other person. The anti-manipulation rules under the Securities Exchange Act of
1934 may apply to sales of securities in the market and to the activities of the
selling stockholders and their affiliates. Furthermore, Regulation M may
restrict the ability of any person engaged in the distribution of the securities
to engage in market-making activities with respect to the particular securities
being distributed for a period of up to five business days before the
distribution. These restrictions may affect the marketability of the securities
and the ability of any person or entity to engage in market-making activities
with respect to the securities.


      Under the registration rights agreement, we have agreed to indemnify the
selling stockholders and other persons against specified claims, losses, damages
and liabilities, including liabilities under federal and state securities laws.
The selling stockholders have agreed to indemnify and hold harmless us, certain
directors, officers and control persons against specified liabilities, including
liabilities under federal and state securities laws. See "Registration Rights of
the Selling Stockholders" on page 10.


      The securities offered hereby were originally issued to the selling
stockholders pursuant to an exemption from the registration requirements of the
Securities Act of 1933. We agreed to register the securities under the
Securities Act of


                                       18


1933. We will pay all expenses relating to the offering and sale of the
securities, with the exception of commissions, discounts and fees of
underwriters, broker-dealers or agents, taxes of any kind and any legal,
accounting and other expenses incurred by the selling stockholders.

      We will not receive any proceeds from sales of any securities by the
selling stockholders.

      We can not assure you that the selling stockholders will sell all or any
portion of the securities offered hereby.

      We will supply the selling stockholders and any stock exchange upon which
the securities are listed with reasonable quantities of copies of this
prospectus. To the extent required by Rule 424 under the Securities Act of 1933
in connection with any resale or redistribution by a selling stockholder, we
will file a prospectus supplement setting forth:

      o     the aggregate number of shares to be sold;

      o     the purchase price;

      o     the public offering price;

      o     if applicable, the names of any underwriter, agent or broker-dealer;
            and

      o     any applicable commissions, discounts, concessions, fees or other
            items constituting compensation to underwriters, agents or
            broker-dealers with respect to the particular transaction (which may
            exceed customary commissions or compensation).

      If a selling stockholder notifies us that a material arrangement has been
entered into with a broker-dealer for the sale of shares through a block trade,
special offering, exchange, distribution or secondary distribution or a purchase
by a broker or dealer, the prospectus supplement will include any other facts
that are material to the transaction. If applicable, this may include a
statement to the effect that the participating broker-dealers did not conduct
any investigation to verify the information set out or incorporated by reference
in this prospectus.

                     INCORPORATION OF DOCUMENTS BY REFERENCE

      The Securities and Exchange Commission allows us to incorporate by
reference the information that we file with them. Incorporation by reference
means that we can disclose important information to you by referring you to
other documents that are legally considered to be part of this prospectus and
later information that we file with the Securities and Exchange Commission will
automatically update and supersede the information in this prospectus, any
supplement and the documents listed below. We incorporate by reference the
specific documents listed below and any future filings made with the Securities
and Exchange Commission under Section 13(a), 13(c), 14, or 15(d) of the
Securities Exchange Act of 1934 until the selling stockholders sell all of the
securities registered hereunder:


      o     our Quarterly Report on Form 10-Q for the quarter ended March 31,
            2002, filed on May 15, 2002;

      o     our Annual Report on Form 10-K for the year ended December 31, 2001,
            filed on March 14, 2002; and

      o     the description of our common stock contained in our Registration
            Statement on Form 8-A, filed on June 22, 1995, and all amendments
            and reports updating such description.

      Upon oral or written request and at no cost to the requester, we will
provide to any person, including a beneficial owner, to whom a prospectus is
delivered, a copy of any or all of the information that has been incorporated by
reference in this prospectus but not delivered with this prospectus. All
requests should be made to: Watts Industries, Inc., 815 Chestnut Street, North
Andover, Massachusetts 01845, Attn: Corporate Secretary. Telephone requests may
be directed to the Corporate Secretary at (978) 688-1811. We have not authorized
anyone to provide you with information other than that incorporated by reference
or provided in this prospectus. You should not assume that the information in
this prospectus or the documents incorporated by reference is accurate as of any
date other than the date on the front of this prospectus or those documents
incorporated by reference, provided that we will supplement this prospectus as
required pursuant to applicable rules and regulations promulgated under the
Securities Act of 1933.



                                       19


                       WHERE YOU CAN FIND MORE INFORMATION

   We are subject to the informational requirements of the Securities Exchange
Act of 1934, as amended, and we are required to file reports and proxy
statements and other information with the Securities and Exchange Commission.
You may read and copy these reports, proxy statements and information at the
Securities and Exchange Commission's Public Reference Room at 450 Fifth Street,
N.W., Room 1024, Washington, D.C. 20549. You may also obtain copies at the
prescribed rates from the Public Reference Section of the Securities and
Exchange Commission at its principal office in Washington, D.C. You may obtain
information on the operation of the Public Reference Room by calling the
Securities and Exchange Commission at 1-800-SEC-0330. The Securities and
Exchange Commission maintains a web site that contains reports, proxy and
information statements and other information regarding registrants, including
Watts Industries, Inc., that file electronically with the Securities and
Exchange Commission. You may access the Securities and Exchange Commission's web
site at http://www.sec.gov.

                                     EXPERTS

      The consolidated financial statements of Watts Industries, Inc. as of
December 31, 2001 and 2000, and for the years ended December 31, 2001 and 2000,
the six month period ended December 31, 1999 and the fiscal year ended June 30,
1999, incorporated by reference in this prospectus and elsewhere in the
registration statement have been audited by KPMG LLP, independent public
accountants, as indicated in their reports with respect thereto, and are
incorporated by reference herein in reliance upon the authority of said firm as
experts in accounting and auditing in giving said reports.

                                 LEGAL MATTERS


      The validity of the issuance of the shares of class A common stock offered
hereby will be passed upon by our counsel, Goodwin Procter LLP.

      No dealer, sales representative or any other person has been authorized to
give any information or to make any representations in connection with this
offering other than those contained in this prospectus, and, if given or made,
such information or representations must not be relied upon as having been
authorized by our company or any other person. This prospectus does not
constitute an offer to sell or a solicitation of an offer to buy any securities
other than the shares of class A common stock to which it relates or an offer
to, or a solicitation of, any person in any jurisdiction where such an offer or
solicitation would be unlawful. Neither the delivery of this prospectus nor any
sale made hereunder shall, under any circumstances, create any implication that
there has been no change in the affairs of our company or that information
contained herein is correct as of any time subsequent to the date hereof.



                                       20



    1,200,000 Shares of Class A Common Stock Underlying Class B Common Stock

                             WATTS INDUSTRIES, INC.

                              Class A Common Stock
                           (par value $0.10 per share)

                                   -----------

                                   PROSPECTUS

                                   -----------

                                 ______________, 2002


                                     Part II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

      The expenses in connection with the issuance and distribution of the
securities being registered are set forth in the following table (all amounts
except the SEC registration fee and New York Stock Exchange listing fee are
estimated):

      SEC registration fee..........................................     $ 1,781
      New York Stock Exchange listing fee...........................      17,700
      Accounting fees and expenses..................................       8,000
      Legal fees and expenses.......................................      20,000
      Miscellaneous.................................................       2,519
      TOTAL.........................................................     $50,000

      All expenses itemized above shall be borne by Watts Industries, Inc.

Item 15. Indemnification of Directors and Officers.

      Section 145 of the Delaware General Corporation Law provides that a
corporation may indemnify any person who was or is a party or is threatened to
be made a party to any threatened, pending or completed action, suit or
proceeding, whether civil, criminal, administrative or investigative, other than
an action by or in the right of the corporation, by reason of the fact that the
person is or was a director, officer, employee or agent of the corporation or is
or was serving at the corporation's request as a director, officer, employee or
agent of another corporation, partnership, joint venture, trust or other
enterprise, against expenses, including attorneys' fees, judgments, fines and
amounts paid in settlement actually and reasonably incurred by the person in
connection with the action, suit or proceeding if the person acted in good faith
and in a manner the person reasonably believed to be in or not opposed to the
best interests of the corporation, and, with respect to any criminal action or
proceeding, had no reasonable cause to believe the person's conduct was
unlawful. The power to indemnify applies to actions brought by or in the right
of the corporation as well, but only to the extent of expenses, including
attorneys' fees but excluding judgments, fines and amounts paid in settlement,
actually and reasonably incurred by the person in connection with the defense or
settlement of the action or suit. And with the further limitation that in these
actions, no indemnification shall be made in the event of any adjudication of
negligence or misconduct in the performance of the person's duties to the
corporation, unless a court believes that in light of all the circumstances
indemnification should apply.

      In accordance with Section 145 of the Delaware General Corporation Law,
Article TENTH of the Restated Certificate of Incorporation, as amended, of Watts
Industries, Inc. ("Watts") provides that no director of Watts shall be
personally liable to Watts or its stockholders for monetary damages for breach
of fiduciary duty as a director, except for liability (i) for any breach of the
director's duty of loyalty to Watts or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law, (iii) under Section 174 of the Delaware General Corporation
Law, or (iv) for any transaction from which the director derived an improper
personal benefit.

      Article V of the Amended and Restated By-laws of Watts provides for
indemnification by Watts of its directors, officers and certain non-officer
employees under certain circumstances against expenses (including attorneys
fees) judgments, fines and amounts paid in settlement reasonably incurred in
connection with the defense or settlement of any threatened, pending or
completed legal proceeding in which any such person is involved by reason of the
fact that such person is or was a director, an officer or an employee of Watts,
or is acting in any capacity with other entities at the request of Watts, if
such person acted in good faith and in a manner he or she reasonably believed to
be in, or not opposed to, the best interests of Watts, and with respect to
criminal actions or proceedings, that such person had no reasonable cause to
believe his or her conduct was unlawful.


                                      II-1


      Section 145(g) of the Delaware General Corporation Law and Article V of
the Amended and Restated By-laws of Watts provide that Watts shall have the
power to purchase and maintain insurance on behalf of its officers, directors,
employees and agents, against any liability asserted against and incurred by
such persons in any such capacity. Watts has obtained insurance covering its
directors and officers against losses and insuring Watts against certain of its
obligations to indemnify its directors and officers.

Item 16. Exhibits.

Exhibit
  No.        Description
-------      -----------

    4.1   -- Restated Certificate of Incorporation, as amended (incorporated
             by reference to Exhibit 3.1 to the Company's Annual Report on Form
             10-K for the year ended June 30, 1995, File No. 001-14787)

    4.2   -- Amended and Restated By-laws, as amended May 11, 1999
             (incorporated by reference to Exhibit 3.2 to the Company's
             Quarterly Report on Form 10-Q for the quarter ended March 31, 1999,
             File No. 001-14787)

   *5.1   -- Opinion of Goodwin Procter LLP

  *23.1   -- Consent of KPMG LLP

   23.2   -- Consent of Goodwin Procter LLP (included in Exhibit 5.1)


 **24.1   -- Power of Attorney


   99.1   -- Registration Rights Agreement dated July 25, 1986 (incorporated
             by reference to Exhibit 10.7 to Amendment No. 2 to the Company's
             Registration Statement on Form S-1 filed August 21, 1986,
             Registration No. 33-6515)

-----------
      *     Filed herewith.


      **    Previously filed.


Item 17. Undertakings.

A.    The undersigned registrant hereby undertakes:

1.    To file, during any period in which offers or sales are being made, a
      post-effective amendment to this registration statement:

      (i)   To include any prospectus required by Section 10(a)(3) of the
            Securities Act of 1933;

      (ii)  To reflect in the prospectus any facts or events arising after the
            effective date of the registration statement (or the most recent
            post-effective amendment thereof) which, individually or in the
            aggregate, represent a fundamental change in the information set
            forth in the registration statement. Notwithstanding the foregoing,
            any increase or decrease in volume of securities offered (if the
            total dollar value of securities offered would not exceed that which
            was registered) and any deviation from the low or high and of the
            estimated maximum offering range may be reflected in the form of
            prospectus filed with the Commission pursuant to Rule 424(b) if, in
            the aggregate, the changes in volume and price represent no more
            than a 20 percent change in the maximum aggregate offering price set
            forth in the "Calculation of Registration Fee" table in the
            effective registration statement.

      (iii) To include any material information with respect to the plan of
            distribution not previously disclosed in the registration statement
            or any material change to such information in the registration
            statement.

      provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply
      if the information required to be included in a post-effective amendment
      by those paragraphs is contained in periodic reports filed with or
      furnished to the Securities and Exchange Commission by the undersigned
      registrant pursuant to Section 13 or 15(d) of the Securities Exchange Act
      of 1934 that are incorporated by reference in the registration statement.


                                      II-2


2.    That, for the purpose of determining any liability under the Securities
      Act of 1933, each such post-effective amendment shall be deemed to be a
      new registration statement relating to the securities offered therein, and
      the offering of such securities at that time to be the initial bona fide
      offering thereof.

3.    To remove from registration by means of a post-effective amendment any of
      the securities being registered which remain unsold at the termination of
      the offering.

4.    The undersigned registrant hereby undertakes that, for purposes of
      determining any liability under the Securities Act of 1933, each filing of
      the registrant's annual report pursuant to Section 13(a) or 15(d) of the
      Securities Exchange Act of 1934 (and, where applicable, each filing of an
      employee benefit plan's annual report pursuant to Section 15(d) of the
      Securities Exchange Act of 1934) that is incorporated by reference in the
      registration statement shall be deemed to be a new registration statement
      relating to the securities offered therein, and the offering of such
      securities at that time shall be deemed to be the initial bona fide
      offering thereof.

5.    Insofar as indemnification for liabilities arising under the Securities
      Act of 1933, may be permitted to directors, officers and controlling
      persons of the undersigned registrant pursuant to the foregoing
      provisions, or otherwise, the undersigned registrant has been advised that
      in the opinion of the Securities and Exchange Commission such
      indemnification is against public policy as expressed in the Act and is,
      therefore, unenforceable. In the event that a claim for indemnification
      against such liabilities (other than the payment by the undersigned
      registrant of expenses incurred or paid by a director, officer or
      controlling person of the undersigned registrant in the successful defense
      of any action, suit or proceeding) is asserted by such director, officer
      or controlling person in connection with the securities being registered,
      the undersigned registrant will, unless in the opinion of its counsel the
      matter has been settled by controlling precedent, submit to a court of
      appropriate jurisdiction the question whether such indemnification by it
      is against public policy as expressed in the Act and will be governed by
      the final adjudication of such issue.


                                      II-3


                                   SIGNATURES


      Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the city of North Andover, Commonwealth of Massachusetts, on May
16, 2002.



                                  WATTS INDUSTRIES, INC.

                              By:             /S/ TIMOTHY P. HORNE
                                  ----------------------------------------------
                                                 Timothy P. Horne
                                  Chairman of the Board, Chief Executive Officer
                                                   and President


      Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.


         Signature           Title                                      Date
         ---------           -----                                      ----



/S/ TIMOTHY P. HORNE         Chairman of the Board,                 May 16, 2002
--------------------------   Chief Executive Officer and President
    Timothy P. Horne         Principal Executive Officer)


/S/ WILLIAM C. MCCARTNEY     Chief Financial Officer and Treasurer  May 16, 2002
--------------------------   (Principal Financial Officer and
    William C. McCartney     Principal Accounting Officer)


            *                Director                               May 16, 2002
--------------------------
    Kenneth J. McAvoy


            *                Director                               May 16, 2002
--------------------------
    Gordon W. Moran


            *                Director                               May 16, 2002
--------------------------
    Daniel J. Murphy, III


            *                Director                               May 16, 2002
--------------------------
    Roger A. Young

* By: /S/ TIMOTHY P. HORNE
      --------------------
      Timothy P. Horne
      Attorney-in-Fact



                                      II-4


                                  EXHIBIT INDEX

Exhibit
  No.      Description
-------    -----------

    4.1 -- Restated Certificate of Incorporation, as amended (incorporated by
           reference to Exhibit 3.1 to the Company's Annual Report on Form 10-K
           for the year ended June 30, 1995, File No. 001-14787)

    4.2 -- Amended and Restated By-laws, as amended May 11, 1999
           (incorporated by reference to Exhibit 3.2 to the Company's Quarterly
           Report on Form 10-Q for the quarter ended March 31, 1999, File No.
           001-14787)

   *5.1 -- Opinion of Goodwin Procter LLP

  *23.1 -- Consent of KPMG LLP

   23.2    Consent of Goodwin Procter LLP (included in Exhibit 5.1)


 **24.1 -- Power of Attorney


   99.1 -- Registration Rights Agreement dated July 25, 1986 (incorporated by
           reference to Exhibit 10.7 to Amendment No. 2 to the Company's
           Registration Statement on Form S-1 filed August 21, 1986,
           Registration No. 33-6515)

-----------
      *    Filed herewith.


      **   Previously filed.