The OR-100 o-ring is a lubricated rubber gasket for Big Blue whole house housings. The OR-100 is NOT for Big Clear housings. The OR-100 O-Ring has been branded under Ace Hardware, American Plumber, Ametek, Culligan, Pentek, and USFilter Ply...
Reviews
3.7
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Wrong size
O-ring is too large for big blue housing at least my big blue housing.
K
Kyle · December 6, 2025
Solved.
Had trouble identifying the model of the water filter to replace the leaking o ring. Waterfilters. net was very helpful in identifying the filter and determining the required o ring. Works great now!