Pentair O-Ring for Big Blue Filter Housing (151122)

Replacement O-Ring for 1/4", 3/8" and 1/2" Inlet Slimline and Standard Filter Housings. The O-Ring is made of Nitrile Rubber or Buna-N rubber for added strength and elasticity to create create a tighter seal. The O-Ring creates a watertight seal in the housing and must be replaced if damaged.