3M Aqua-Pure 68898-31 Compatible Square Cut Orings, 3 Pack

KleenWater KW108 Square Cut O-Rings, Set of 3, Compatible with 3M Aqua-Pure 68898-31, Pentek 151254, American Plumber WBC-OR and Selecto Scientific 101-151

• Please note these are are the less common "square cut edge" type
• Replacement for 3M Aqua-Pure AP801 68898-31
• Replacement for Pentek Pentair "Big Blue" 151254
• Replacement for American Plumber W10-BC & W15-BC part # WBC-OR
• Replacement for Selecto Scientific 101-151

Compatible with 3M Aqua-Pure 68898-31, Pentek 151254, American Plumber WBC-OR and Selecto Scientific 101-151.

This o-ring will accommodate the filter housings referenced above which require large diameter cartridges which have an approximate diameter of 4.5 inches. The o-ring itself actually measures approximately 5 3/4" (inside diameter). An o-ring facilitates a water tight seal between the water filter sump and the water filter head. The most common o-rings used in water filtration are made from Buna N material. Buna N is also commonly referred to as nitrile. This is the ideal choice for cold water filtration because they are inexpensive and have superior performance characteristics.