AMENDMENT TO VOTING TRUST AGREEMENT


   WHEREAS, Timothy P. Horne and Frederic B. Horne are trustees (the "Trustees")
under the Horne  Family  Voting  Trust  Agreement - 1991 dated as of October 31,
1991 (the "Agreement"); and

      WHEREAS,  Frederic B. Horne desires to withdraw Eleven  Thousand  (11,000)
shares  of  Class  B  Common  Stock  of  Watts  Industries,   Inc.,  a  Delaware
corporation,  for the  purpose of  gifting  such  shares to his minor  daughter,
Kristina M. Horne; and

      WHEREAS,  the  Trustees  desire to amend  Schedule A to the  Agreement  to
reflect such transaction.

      NOW, THEREFORE, the parties do hereby agree as follows:

      1.  Schedule A to the  Agreement  is hereby  amended  and  restated in its
entirety to read as follows:

                                   SCHEDULE A
                                   ----------
STOCKHOLDER                      NO. OF SHARES*          CLASS B CERT. NO.
- -----------                      --------------          -----------------
Timothy P. Horne ("TPH")            2,751,220               126, 161

Frederic B. Horne ("FBH")           1,344,166               159, 185

Timothy P. Horne
and George B. Horne ("GBH")
as trustees of The
George B. Horne
Trust - 1982                        2,004,600               132, 158, 184

Frederic B. Horne,
as Trustee of The
Peter W. Horne Trust - 1976         1,285,840               156, 175

FBH and GBH, trustees of
The GBH Grandchildren's 1995
Irrevocable Trust f/b/o
Kristina M. Horne                      22,600               184

TPH and GBH, trustees of
The GBH Grandchildren's 1995
Irrevocable Trust f/b/o
Tara V. Horne                          30,200               184




STOCKHOLDER                      NO. OF SHARES*          CLASS B CERT. NO.
- -----------                      --------------          -----------------
TPH and GBH, trustees of
The GBH Grandchildren's 1995
Irrevocable Trust f/b/o
Tiffany R. Horne                       22,600               184

Timothy P. Horne,
as Trustee of The Deborah
Horne Trust - 1976                  1,335,840               138, 157

Timothy P. Horne,
as Trustee of The Daniel
W. Horne Trust - 1980               1,335,840               134, 155

Tara V. Horne                          50,000               126

Judith Rae Horne,
as Trustee of The Tiffany
Rae Horne Trust - 1984                 50,000               126

* As  adjusted  to reflect the  two-for-one  stock split  effected by means of a
stock dividend payable on March 15, 1994.

      2.    Except as hereinabove  provided,  the parties ratify and confirm the
            Agreement in all respects.


      The parties hereto have executed this Amendment to the Agreement in one or
more counterparts under seal as of November 19, 1996.

                                          -------------------------
                                          Timothy P. Horne, as Trustee
                                          of the Horne Family Voting
                                          Trust - 1991

                                          -------------------------
                                          Frederic B. Horne, as Trustee
                                          of the Horne Family Voting
                                          Trust - 1991



                       AMENDMENT TO VOTING TRUST AGREEMENT


   WHEREAS, Timothy P. Horne and Frederic B. Horne are trustees (the "Trustees")
under the Horne  Family  Voting  Trust  Agreement - 1991 dated as of October 31,
1991 (the "Agreement"); and

      WHEREAS,  Frederic B. Horne desires to withdraw  Fifty  Thousand  (50,000)
shares  of  Class  B  Common  Stock  of  Watts  Industries,   Inc.,  a  Delaware
corporation,  for the  purpose of  converting  such  shares to shares of Class A
Common Stock; and

      WHEREAS,  the  Trustees  desire to amend  Schedule A to the  Agreement  to
reflect such transaction.

      NOW, THEREFORE, the parties do hereby agree as follows:

      1.  Schedule A to the  Agreement  is hereby  amended  and  restated in its
entirety to read as follows:

                                   SCHEDULE A

STOCKHOLDER                      NO. OF SHARES*          CLASS B CERT. NO.
- -----------                      --------------          -----------------
Timothy P. Horne ("TPH")            2,751,220               126, 161

Frederic B. Horne ("FBH")           1,294,166               185, 188

Timothy P. Horne
and George B. Horne ("GBH")
as trustees of The
George B. Horne
Trust - 1982                        2,004,600               132, 158, 184

Frederic B. Horne,
as Trustee of The
Peter W. Horne Trust - 1976         1,285,840               156, 175

FBH and GBH, trustees of
The GBH Grandchildren's 1995
Irrevocable Trust f/b/o
Kristina M. Horne                      22,600               184

TPH and GBH, trustees of
The GBH Grandchildren's 1995
Irrevocable Trust f/b/o
Tara V. Horne                          30,200               184



STOCKHOLDER                      NO. OF SHARES*          CLASS B CERT. NO.
- -----------                      --------------          -----------------
TPH and GBH, trustees of
The GBH Grandchildren's 1995
Irrevocable Trust f/b/o
Tiffany R. Horne                       22,600               184

Timothy P. Horne,
as Trustee of The Deborah
Horne Trust - 1976                  1,335,840               138, 157

Timothy P. Horne,
as Trustee of The Daniel
W. Horne Trust - 1980               1,335,840               134, 155

Tara V. Horne                          50,000               126

Judith Rae Horne,
as Trustee of The Tiffany
Rae Horne Trust - 1984                 50,000               126

* As  adjusted  to reflect the  two-for-one  stock split  effected by means of a
stock dividend payable on March 15, 1994.

      2.    Except as hereinabove  provided,  the parties ratify and confirm the
            Agreement in all respects.


      The parties hereto have executed this Amendment to the Agreement in one or
more counterparts under seal as of February 24, 1997.

                                          -------------------------
                                          Timothy P. Horne, as Trustee
                                          of the Horne Family Voting
                                          Trust - 1991

                                          -------------------------
                                          Frederic B. Horne, as Trustee
                                          of the Horne Family Voting
                                          Trust - 1991




                       AMENDMENT TO VOTING TRUST AGREEMENT


   WHEREAS, Timothy P. Horne and Frederic B. Horne are trustees (the "Trustees")
under the Horne  Family  Voting  Trust  Agreement - 1991 dated as of October 31,
1991 (the "Agreement"); and

      WHEREAS, Peter W. Horne desires to withdraw Fifty Thousand (50,000) shares
of Class B Common Stock of Watts Industries,  Inc., a Delaware corporation,  for
the purpose of converting such shares to shares of Class A Common Stock; and

      WHEREAS,  the  Trustees  desire to amend  Schedule A to the  Agreement  to
reflect such transaction.

      NOW, THEREFORE, the parties do hereby agree as follows:

      1.  Schedule A to the  Agreement  is hereby  amended  and  restated in its
entirety to read as follows:

                                   SCHEDULE A

STOCKHOLDER                      NO. OF SHARES*          CLASS B CERT. NO.
- -----------                      --------------          -----------------
Timothy P. Horne ("TPH")            2,751,220               126, 161

Frederic B. Horne ("FBH")           1,294,166               185, 188

Timothy P. Horne
and George B. Horne ("GBH")
as trustees of The
George B. Horne
Trust - 1982                        2,004,600               132, 158, 184

Frederic B. Horne,
as Trustee of The
Peter W. Horne Trust - 1976         1,235,840               156, 190

FBH and GBH, trustees of
The GBH Grandchildren's 1995
Irrevocable Trust f/b/o
Kristina M. Horne                      22,600               184

TPH and GBH, trustees of
The GBH Grandchildren's 1995
Irrevocable Trust f/b/o
Tara V. Horne                          30,200               184



STOCKHOLDER                      NO. OF SHARES*          CLASS B CERT. NO.
- -----------                      --------------          -----------------
TPH and GBH, trustees of
The GBH Grandchildren's 1995
Irrevocable Trust f/b/o
Tiffany R. Horne                       22,600               184

Timothy P. Horne,
as Trustee of The Deborah
Horne Trust - 1976                  1,335,840               138, 157

Timothy P. Horne,
as Trustee of The Daniel
W. Horne Trust - 1980               1,335,840               134, 155

Tara V. Horne                          50,000               126

Judith Rae Horne,
as Trustee of The Tiffany
Rae Horne Trust - 1984                 50,000               126

* As  adjusted  to reflect the  two-for-one  stock split  effected by means of a
stock dividend payable on March 15, 1994.

      2.    Except as hereinabove  provided,  the parties ratify and confirm the
            Agreement in all respects.


      The parties hereto have executed this Amendment to the Agreement in one or
more counterparts under seal as of June 5, 1997.

                                          -------------------------
                                          Timothy P. Horne, as Trustee
                                          of the Horne Family Voting
                                          Trust - 1991

                                          -------------------------
                                          Frederic B. Horne, as Trustee
                                          of the Horne Family Voting
                                          Trust - 1991



                                    AMENDMENT
                                       TO
                    HORNE FAMILY VOTING TRUST AGREEMENT--1991

      AMENDMENT dated as of the 26th day of August, 1997 by and among Timothy P.
Horne and Frederic B. Horne, as trustees  (together,  the "Trustees")  under the
Horne  Family  Voting Trust  Agreement--1991  (the  "Voting  Trust  Agreement"),
Timothy  P.  Horne,  Frederic  B.  Horne,  George B.  Horne  and Tara V.  Horne,
individually,  Timothy P.  Horne as trustee of the Daniel W. Horne  Trust--1980,
Timothy P. Horne as trustee of the Deborah Horne Trust--1976,  Frederic B. Horne
as  trustee of the Peter W.  Horne  Trust--1976,  Timothy P. Horne and George B.
Horne, as Trustees of the Grandchildren's  Trust f/b/o Tara V. Horne, Timothy P.
Horne and George B.  Horne,  as  Trustees  of the  Grandchildren's  Trust  f/b/o
Tiffany R.  Horne,  Frederic  B. Horne and George B.  Horne,  as Trustees of the
Grandchildren's  Trust f/b/o Kristina M. Horne and Judith Rae Horne, as Trustees
of the Tiffany Rae Horne  Trust--1984  (each, a "Stockholder"  and collectively,
the  "Stockholders")  and Watts  Industries,  Inc., a Delaware  corporation (the
"Company").

      WHEREAS, each of the holders of voting trust certificates under the Voting
Trust  Agreement,  other than Frederic B. Horne as trustee of the Peter W. Horne
Trust--1976,  desires to withdraw all of such holder's  shares of Class B Common
Stock,  par  value  $.10 per  share  ("Class B Common  Stock"),  of the  Company
represented by such voting trust certificates from the Voting Trust Agreement.

      WHEREAS,  the Trustees desire to consent and agree to the  above-described
withdrawals.

      WHEREAS,  the Trustees and the  Stockholders,  representing the registered
holders of a majority of the voting trust  certificates  outstanding,  desire to
amend the Voting Trust  Agreement to provide that the Voting Trust Agreement may
be  terminated by a written  amendment  signed by all of the Trustees and by the
registered  holders of a majority of the voting trust  certificates  outstanding
under the Voting Trust Agreement at the time of any such proposed termination.

      NOW, THEREFORE, the parties hereto do hereby agree as follows:

      1. The parties hereto do hereby consent to the withdrawal  from the Voting
Trust  Agreement  of all shares of Class B Common  Stock  represented  by voting
trust certificates outstanding as of the date hereof, other than those shares of
Class B Common Stock  represented by voting trust  certificates held by Frederic
B. Horne as trustee of the Peter W. Horne  Trust--1976,  and amend Schedule A to
the Voting Trust Agreement by amending and restating  Schedule A is its entirety
to read as Schedule A attached hereto.



      2. Section 13 of the Voting Trust  Agreement is hereby amended by deleting
such Section 13 in its entirety and substituting therefor the following:

      "13.  Amendment;  Termination.  This Agreement may be amended by a written
amendment signed by all of the Trustees and by registered  holders of a majority
of the voting trust certificates then outstanding; provided, however, that after
each of TIMOTHY P. HORNE,  FREDERIC B. HORNE and all  individuals  appointed  as
Trustees  pursuant to the second paragraph of Section 11 shall cease to serve as
Trustees hereunder, this Agreement may be amended by a written instrument signed
by  registered  holders of a  majority  of the voting  trust  certificates  then
outstanding.  For all purposes of this  Agreement,  references to percentages of
voting  trust  certificates  outstanding  shall  refer  to the  number  of votes
represented  by the shares of stock of the  Company  represented  by such voting
trust certificates.

      This Agreement may be terminated  only by a written  instrument  signed by
all of the  Trustees  and  registered  holders of a majority of the voting trust
certificates then outstanding;  provided, however, that after each of TIMOTHY P.
HORNE, FREDERIC B. HORNE and all individuals  designated as Trustees pursuant to
the second  paragraph of Section 11 shall cease to serve as Trustees  hereunder,
this  Agreement may be  terminated as provided  above but without the consent of
the Trustees.

      If not  previously  terminated in accordance  with the terms hereof,  this
Agreement  shall  terminate  ten (10)  years  from  the date of this  Agreement;
provided,  however, that at any time within two (2) years prior to such date (or
any  subsequent  date of  termination  fixed in accordance  with the  provisions
hereof  and  applicable  law),  one or more  of the  persons  designated  in the
following  provisions of this Section 13 may, by written  agreement,  extend the
duration of this  Agreement for an  additional  term not exceeding 10 years from
the expiration date as originally fixed or as last extended. The foregoing right
of extension shall be exercisable by (i) any individual  Stockholder  living who
holds one or more voting trust certificates and not subject to any incapacity at
the time of the proposed  extension,  and if so exercised  shall be binding upon
any and all holders of voting trust certificates in respect of shares originally
or subsequently  deposited  hereunder by such individual  Stockholder,  (ii) the
trustee of any trust  Stockholder  that holds voting trust  certificates  who is
living and not subject to any incapacity at the time of the proposed  extension,
and  regardless  of whether  such trust is then  still in  existence,  and if so
exercised shall be binding upon any and all holders of voting trust certificates
in respect of shares  originally  or  subsequently  deposited  hereunder by such
trust  Stockholder  and any and  all  beneficiaries  thereof  or  successors  in
interest  thereto,  and  (iii)  the  holder  of  any  voting  trust  certificate
representing  shares not covered by either of the preceding clauses (i) or (ii),
and if so exercised shall be effective with respect to all shares represented by
such voting  trust  certificate,  it being  understood  that the  provisions  of
clauses (i) or (ii) of this  paragraph  (and not this clause (iii)) shall govern
any extension with respect to shares  referred to therein if and to the extent a
Stockholder  referred to therein is able to consent to such extension.  Any such
action  to  extend  this  Agreement  shall be  binding  upon the  Trustees,  any
Stockholder  or other person  consenting to such extension as provided above and
all successors in interest of any such  Stockholder  or other person  (including
without



limitation any holder of voting trust certificates representing shares deposited
by any  Stockholder  consenting  (or on whose  behalf  consent is given) to such
extension in the manner  provided  above).  Extensions in  accordance  with this
Section  13 (i)  shall not be deemed to  constitute  the  commencement  of a new
voting trust for purposes of the DGCL,  (ii) shall be filed with the  registered
office of the  Company  in  Delaware,  as  provided  by law and (iii)  shall not
involve or require any transfer of shares as  contemplated by the last paragraph
of Section 5."

      3. The effective date of this Amendment  shall be the date first set forth
above.

      4. As amended by this  Amendment,  the Voting  Trust  Agreement  is in all
respects ratified and confirmed,  and as so amended by this Amendment the Voting
Trust  Agreement  shall  be  read,  taken  and  construed  as one and  the  same
instrument.

      5. This Amendment may be executed in any number of counterparts and by the
parties  hereto in separate  counterparts,  each of which so  executed  shall be
deemed to be an original, but all of such counterparts shall together constitute
but one and the same instrument.

      6. This First  Amendment  shall be governed in accordance with the laws of
the State of Delaware without regard to principles of conflicts of law.


                 [Remainder of page intentionally left blank.]





      The parties  hereto  have  executed  this  Amendment  to the Voting  Trust
Agreement in one or more  counterparts  under seal as of the __th day of August,
1997.


                                            WATTS INDUSTRIES, INC.


                                            By: -------------------------------
                                                Timothy P. Horne, Chairman


                                            -----------------------------------
                                            Timothy P. Horne, as Trustee and a
                                            Stockholder


                                            -----------------------------------
                                            Frederic B. Horne, as Trustee and a
                                            Stockholder


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


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


                                            -----------------------------------
                                            Frederic B. Horne, as Trustee of the
                                            Peter W. Horne Trust--1976


                                            -----------------------------------
                                            Timothy P. Horne, as Trustee of the
                                            Deborah Horne Trust--1976


                                            -----------------------------------
                                            Timothy P. Horne, as Trustee of the
                                            Daniel W. Horne Trust--1980



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




                                  SCHEDULE A

                                                    Number of Shares
            Name                                of Class B Common Stock

      Frederic B. Horne as trustee of the
      Peter W. Horne Trust--1976                       1,235,840