Culligan 4-3/8 in. D Rubber O-Ring 2 pk

The Culligan OR-34 O-ring fits the following whole house water filters with a 3/4 inch inlet/outlet Culligan models HF-150A, HF-160 or HF-360A. The O-ring is used to seal the housing canister to the housing cap to prevent leaks. Replace your O-ring every third filter change or when there is damage to prevent leaks.