AMENDMENT NO. 1 TO

                              AMENDED AND RESTATED
                           STOCK RESTRICTION AGREEMENT

     AMENDMENT NO. 1 TO STOCK  RESTRICTION  AGREEMENT made as of August 26, 1997
by and among the undersigned,  each of whom is a stockholder or beneficiary of a
trust stockholder  (hereinafter  individually referred to as a "Stockholder" and
collectively  as the  "Stockholders")  of Watts  Industries,  Inc.  (hereinafter
referred to as the  "Company"),  a corporation  organized  under the laws of the
State of Delaware.
                                     WITNESSETH
     WHEREAS,  the shares of Class B Common Stock,  par value $.10 per share, of
the Company  (the "Class B Common  Stock")  owned or  beneficially  owned by the
undersigned are subject to a Stock Restriction Agreement dated as of October 31,
1991 (the "Existing Agreement"); and
      WHEREAS,  the parties  hereto  desire to amend  certain  provisions of the
Existing  Agreement.  NOW THEREFORE,  in consideration of the mutual promises
herein contained,  the parties hereto hereby amend the Existing  Agreement as
follows:
     1. Restatement of Section 7. Section 7 of the Existing  Agreement is hereby
amended and restated in its entirety to read as follows:

     "7.   Exceptions to Restrictions
     The restrictions set forth in this Agreement shall be inapplicable to:
           a.  transfers of Stock between any Stockholder and his guardian or
               conservator;

           b.  transfers of Stock upon any Stockholder's death to his executors
               or administrators or to the trustees under his will;

           c.  transfers of Stock among or between persons (if not individuals,
               the beneficial interest(s) in which are owned by, and the
               trustees or directors and officers of which are, an individual or
               individuals) having a family relationship (i.e., a relationship
               by blood, marriage or adoption) with Timothy P. Horne, Frederic
               B. Horne or George B. Horne, including the estates of such
               persons, or among or between any of such persons or estates and
               the trustees under the Horne Family Voting Trust Agreement - 1991
               or The George B. Horne Voting Trust Agreement - 1997, in each
               case as the same may be amended, or any successor trust or trusts
               formed by members of the Horne family; and

           d.  transfers of Stock (by  redemption or otherwise) to the Company
               upon the death of any person having a family  relationship  (as
               defined in paragraph c) with Timothy P. Horne, Frederic B.
               Horne or George B. Horne;

provided,  however, that such Stock in the hands of each such transferee (except
the  Company  in  connection  with a transfer  contemplated  by clause d of this
Section 7) shall remain subject to this  Agreement.  In the event Stock is or is
to be transferred upon or as a result of death to any of the persons or entities
described  in clauses a, b, c or d of this  Section 7, Section 3 shall not apply
to such  transfer,  provided  that  such  Stock  shall  remain  subject  to this
Agreement in the hands of the relevant transferee."
     2. Schedule A. Schedule A to the Existing  Agreement is hereby  deleted and
replaced with Schedule A attached hereto,  which replacement Schedule A reflects
the Stockholders who are parties to the Existing Agreement and the Stock subject
to the Existing Agreement as of the date of this Amendment.
     3.    Governing Law; Effect of Amendment
     This  Amendment  shall be  construed  under and governed by the laws of the
State of Delaware. Except as amended hereby, the Existing Agreement shall remain
in full force and effect in accordance with its terms.



     IN WITNESS  WHEREOF,  each of the  undersigned  has executed or caused this
Agreement to be duly  executed as of the date first set forth  above,  in one or
more  counterparts,  each of which shall be deemed an original  and all of which
together shall constitute a single instrument executed under seal.

                                         --------------------------
                                         Timothy P. Horne


                                         --------------------------
                                         Frederic B. Horne



                                         The Deborah Horne Trust - 1976


                                         By: _______________________
                                             Timothy P. Horne, as Trustee, and
                                             his successors in trust and not
                                             individually



                                         The Daniel W. Horne Trust - 1980


                                         By: _______________________
                                             Timothy P. Horne, as Trustee, and
                                             his successors in trust and not
                                             individually



                                         The Peter W. Horne Trust - 1976


                                         By: _______________________
                                             Frederic B. Horne, as Trustee, and
                                             his successors in trust and not
                                             individually




                                         --------------------------
                                         Deborah Horne


                                         --------------------------
                                         Daniel W. Horne


                                         --------------------------
                                         Peter W. Horne

                                         The George B. Horne Trust - 1982


                                         By: ______________________
                                             George B. Horne, as Trustee, and 
                                             his successors in trust and not
                                             individually


                                         By: ______________________
                                             Timothy P. Horne, as Trustee, and
                                             his successors in trust and not
                                             individually


                                         --------------------------
                                         George B. Horne



                                         --------------------------
                                         Tara V. Horne



- -----------------------------------         ----------------------------------
Timothy P. Horne, as Trustee of the         George B. Horne, as Trustee of the
Grandchildren's Trust f/b/o                 Grandchildren's Trust f/b/o
Tara V. Horne                               Tara V. Horne




- -----------------------------------         ----------------------------------
Timothy P. Horne, as Trustee of the         George B. Horne, as Trustee of the
Grandchildren's Trust f/b/o                 Grandchildren's Trust f/b/o
Tiffany R. Horne                            Tiffany R. Horne



- -----------------------------------         ----------------------------------
Frederic B. Horne, as Trustee of the        George B. Horne, as Trustee of the
Grandchildren's Trust f/b/o                 Grandchildren's Trust f/b/o
Kristina M. Horne                           Kristina M. Horne




                                            ----------------------------------
                                             Judith Rae Horne, as Trustee of the
                                             Tiffany Rae Horne Trust--1984


ACKNOWLEDGED:


- --------------------------               ------------------------
Timothy P. Horne, as Trustee             Frederic B. Horne, as Trustee
under the Horne Family Voting                  under the Horne Family Voting
Trust Agreement - 1991 dated                   Trust Agreement - 1991 dated
October 31, 1991, as the same                  October 31, 1991, as the same
may be amended, and his                        may be amended, and his
successors in trust                            successors in trust


- --------------------------
Timothy P. Horne,  as Trustee
under the George B. Horne Voting
Trust Agreement - 1997 dated August __,
1997,  as the same may be amended, 
and his  successors in trust.



                            SCHEDULE A TO AMENDMENT NO. 1
                             STOCK RESTRICTION AGREEMENT


          Name of Stockholder               Shares of Class B Common Stock


Timothy P. Horne                                     2,751,220**

Frederic B. Horne                                     1,865,323

Timothy P. Horne and George B. Horne,                2,104,600**
as Trustees of the George B. Horne                     20,000
Trust - 1982

Timothy P. Horne as Trustee of The                   1,335,840**
Daniel W. Horne Trust - 1980

Timothy P. Horne as Trustee of The                   1,335,840**
Deborah Horne Trust - 1976

Frederic B. Horne as Trustee of The                  1,235,840*
Peter W. Horne Trust - 1976

Timothy P. Horne and George B. Horne                  30,200**
as Trustees of the Grandchildren's
1995 Irrevocable Trust f/b/o Tara V.
Horne

Timothy P. Horne and George B. Horne                  22,600**
as Trustees of the Grandchildren's
1995 Irrevocable Trust f/b/o Tiffany
R. Horne

Frederic B. Horne and George B. Horne                  22,600
as Trustees of the Grandchildren's
1995 Irrevocable Trust f/b/o Kristina
M. Horne

Tara V. Horne                                         50,000**

Judith Rae Horne as Trustee of the                    50,000**
Tiffany Rae Horne Trust -1984

Frederic B. Horne as Custodian for                     11,000
Kristina M. Horne under the
Massachusetts Uniform Gifts to Minors
Act

- --------------

*    Shares are subject to the Horne Family Voting Trust  Agreement - 1991 dated
     as of October 31, 1991,  as the same may be amended,  the trustees of which
     voting trust may be deemed the record holder of such shares.

**   Shares are subject to The George B. Horne  Voting  Trust - 1997 dated as of
     August __, 1997,  as the same may be amended,  the trustees of which voting
     trust may be deemed the record holder of such shares.