The Pentair 10" Standard filter housing with pressure relief is perfect for a wide range of applications, including residential, commercial and industrial filtration. The filter sump is made of reinforced polypropylene for strength and resistance to chemicals. This filter housing uses a nitrile butadiene rubber (Buna-N) O-ring to ensure a watertight seal, and features a pressure relief button on the inlet side of the housing for easy filter cartridge changes. The housing can be used with 10" x 2½" filter cartridges (sold separately).