The o-ring is made of nitrile butadiene rubber (Buna-N) which offers superior flexibility and resistance to tearing during installation and use. This o-ring fits Pentek Standard and 3G standard filter housings, which are used in various applications and labeled under many brand names.
This is compatible with the following filters:
10″ and 20″ housings with 3/4″ inlet/outlet connections.
Whole House Blue Jumbo Filters
If you do not know the size of your system’s o-ring, open the filter housing and measure the diameter of the o-ring. Your housing determines your o-ring size and not the filter that is used inside your housing.