WATTS WATER TECHNOLOGIES INC — Director's Dealing 2010

May 19, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WATTS WATER TECHNOLOGIES INC (WTS)
CIK: 0000795403
Period of Report: 2010-05-18

Reporting Person: MCCARTNEY WILLIAM C (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-18	Class A Common Stock	M	25000	$17.5	Acquired	81380	Direct
2010-05-18	Class A Common Stock	M	25000	$15.75	Acquired	106380	Direct
2010-05-18	Class A Common Stock	M	25000	$15.45	Acquired	131380	Direct
2010-05-18	Class A Common Stock	S	75000	$34.8143	Disposed	56380	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-05-18	Stock Option (right to buy)	$15.45	M	25000	Disposed	2011-08-20	Class A Common Stock (25000)	Direct
2010-05-18	Stock Option (right to buy)	$15.75	M	25000	Disposed	2012-07-24	Class A Common Stock (25000)	Direct
2010-05-18	Stock Option (right to buy)	$17.5	M	25000	Disposed	2013-08-06	Class A Common Stock (25000)	Direct

Footnotes

F1: The stock option vests in five equal annual installments beginning on the date set forth above.