Replacement O-ring seal for use with the Culligan WH-S200-C. Ensures the seal of the water filtration system. 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. Product Features: Easy to use Commonly used with Culligan WH-S200-C (Ace #4867560) Make sure to use a food grade lubricant on the O-ring when replacing Flexibility and tear resistance to ensure long lasting use