Pentek OR-100

http://www.waterfilters.net/culligan-or-100-hd-950-o-ring-4987.html?fquery=pentek+or-100
The OR-100 o-ring is a lubricated rubber gasket for many whole house filter housings. The OR-100 is NOT for Big Clear (BC) housings. The OR-100 O-Ring has been branded under Ace Hardware, American Plumber, Ametek, Culligan, Pentek, US Filter, and Plymouth Products. The OR-100 rubber o-ring gasket is 5.75" in diameter and is a Buna-N FDA grade o-ring used to seal the housing sump to the housing cap to prevent leaks. The Pentek OR-100 o-ring gasket should be well lubricated with silicone lubricant to prevent leaks in the water filtration system. The OR-100 should be replaced every two filter changes or if there is damage to the O-ring.