Pentair U9-229 O-Ring for Trap Cover Replacement for Select Sta-Rite Pool and Spa Pump O-ring for trap cover replacement O-ring is Fits Pentair JWPA and JWP above ground series pool and spa 1/2, 3/4, 1 and 1-1/2 HP pump models Replace O-rings when cracked or swollen Not replacing O-rings can damage Measures 5-inch diameter