3 Pieces O-Ring 151120 152030 W34-OR WFAO150 for Pentek Water Filter Housing Replacement Part Number:Ace Hardware 46766, American Plumber 152030, W34-OR, Ametek Kleen-Plus 151120-03, OR-34, Culligan 01019184, 151120-27, Du Pont WFAO150, Hydrotech 151120, Pentek 151120, Omnifilter 151120, OR-34, Pura 151120, US Filter OR-34 Applications:Fit for following models:Pentek/Pentair 3G Standard Series (150542, 150546, 150558, 150587, 150550, 150566, 150574, 150544, 150560, 150564, 150552, 150568)Pentek/Pentair Traditional Standard Series (150001, 150002, 150067, 150068, 150071, 150072, 150435, 150436, 150328, 150069, 150070, 150326)Pentek/Pentair Valve-In-Head (VIH) Series (150164, 150437, 150329, 150166)Ace Hardware 45025, 46764, 46764 American Plumber W34-PR, WC34-PR, WV34, WVC34 Ametek Kleen-Plus PSCL-SI / PSCL-S1, PS-OO / PS-00, PVHCL-SI / PVHCL-S1 Culligan HF-150, HF-150A, HF-160, HF-360 Omnifilter WH1, WH5, WH12, OB1 (Series A), U25 (Series E)