CFS O-Ring Compatible with Pentek 151122, Culligan OR-250, iSpring ORBX2, W10-OR - Big Blue 10 & 20 in Housings - AS568-357 Buna-N

Fit and part numbers

• Ring size: AS568-357, about 5.475 in ID x 0.210 in thick, Buna-N (nitrile) 70.
• Compatible with: Pentair Pentek 151122, 151121; Culligan OR-250, CW25-BBS, WH-HD200-C; 3M 3WH-HD-S01; iSpring ORBX2; Whirlpool WHKF-C9, WHKF-DWHBB, WOR-FF; American Plumber / Ametek W10-OR, 152032; DuPont WFAO100; Culligan 4WH-HDGAC-F01; Keystone GHPT-10; EcoPure EPOR, EPWO4; AO Smith AO-WH-LG-OR, AO-WH-PREL; HDX4CF4; Campbell HDF150; GE HHRING, WS03X10039.
• Fits 4.5 in diameter Big Blue style housings, 10 in and 20 in.

CFS is an independent brand. These are compatible replacement O-rings, not OEM parts. Part numbers and brand names are used only to show fit.

Replacement O-ring for 4.5 in wide Big Blue water filter housings, 10 in and 20 in lengths.

Compatible with Pentair Pentek 151122, EcoPure EPOR (EPWO4 housings), GE HHRING / WS03X10054, AO Smith, Culligan OR-250 and 3M 3WH-HD-S01 Big Blue housings.

• Black Buna-N (nitrile) rubber
• About 5.5 in inside diameter, 5.9 in outside diameter and 0.21 in thick (AS568-357)
• One ring seals one housing; the 3 pack keeps spares on hand
• Not for slim line 2.5 in housings or reverse osmosis membrane housings

Install: turn off the water and release pressure, unscrew the sump, remove the old ring and wipe the groove clean. Add a thin coat of food-grade silicone grease, seat the new ring flat with no twists, then hand-tighten.

Complete Filtration Services, family owned since 2006.