Three Water Filter Housing Replacement O-Rings for Cuno Aqua-Pure AP217
Replacement o-ring for 3M Purification Cuno Model AP200. We recommend consumers keep a spare o ring on hand to avoid urgent situations.
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.