This Pentek 151122 OR-100 O-ring is used to seal water filter housings. It has a diameter of 5-3/4 inches and is made of nitrile butadiene rubber (Buna-N) for flexibility and resistance to abrasion and tearing. The o-ring fits Pentek Big Blue filter housings, which are used in various applications, such as drinking water purification, swimming pools, industrial processes, and more.
Captain O-Ring's OEM size o-ring fits perfectly into the groove of Big Blue Filters. No need to stretch or squeeze o-rings with two sets of hands like off-sized aftermarket o-rings. Our o-rings are packaged flat, and not curled into undersized bags, so the o-ring lays flat in your filter housing instead of being twisted. Changing your o-ring with a Captain O-Ring OEM size replacement takes only 4-5 seconds once the housing is removed from the filter head.