X0202 4 2008-03-12 0000077360 PENTAIR INC PNR 0001197608 GLENN T MICHAEL 5500 WAYZATA BLVD. SUITE 800 GOLDEN VALLEY MN 55416-1261 1 0 0 0 Phantom Stock Units - Deferred Compensation 1 2008-03-12 4 A 0 81.416 31.3206 A Common Stock 81.416 991.269 I Plan Agent Phantom stock units convert into common stock on a one-for-one basis. Represents phantom stock units credited under a deferred compensation plan for non-employee directors over which the reporting person has no current dispositive or voting power. Shares acquired under this Plan are purchased over a three-day trading period. The price shown is the average purchase price over the trading period. Settlement of phantom stock units will be in Pentair common stock in accordance with reporting person's irrevocable election. Louis L. Ainsworth, Attorney-in-Fact 2008-03-14