WATTS WATER TECHNOLOGIES INC — Director's Dealing 2010

May 27, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WATTS WATER TECHNOLOGIES INC (WTS)
CIK: 0000795403
Period of Report: 2010-05-19

Reporting Person: HORNE TIMOTHY P (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-19	Class A Common Stock	C	100000	—	Acquired	110671	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-05-19	Class B Common Stock	$	C	100000	Disposed		Class A Common Stock (100000)	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$		Class A Common Stock (5019490)	5019490	Indirect

Footnotes

F1: Shares of Class B Common Stock are convertible into shares of Class A Common Stock on a 1-for-1 basis.

F2: All shares of Class B Common Stock were convertible into Class A Common Stock upon issuance and do not have an expiration date.

F3: Consists of the following shares of Class B Common Stock: (i) 1,666,970 shares held for the benefit of Daniel W. Horne, which are subject to The Amended and Restated George B. Horne Voting Trust Agreement - 1997 (the "1997 Voting Trust") for which the Reporting Person serves as trustee, (ii) 1,666,970 shares held for the benefit of Deborah Horne under a trust for which the Reporting Person serves as trustee, (iii) 1,495,010 shares held for the benefit of Peter W. Horne under a trust, which are subject to the 1997 Voting Trust, (iv) 20,200 and 22,600 shares held for the benefit of Tara V. Horne and Tiffany R. Horne, respectively, under irrevocable trusts for which the Reporting Person serves as trustee, and (v) 147,740 shares held for the benefit of Tiffany R. Horne under a trust, which are subject to the 1997 Voting Trust.