O-Ring Information: OR-34 / OR-34A O-Rings Compatible with Culligan Filters Upon purchase, you will receive 1 set of new OR-34 / OR-34A O-Rings , which prevents water leakage from the filter housing Compatibility: OR-34 / OR-34A O-Ring, compatible with Culligan and Ace filters, fits Culligan HF-150(A), HF-160, etc., fits U25 Omni Whole House Filter Housings, American Plumber WVC34 and Whole House Filters Excellent performance: O-ring replacement parts are made of high quality synthetic rubber, wear-resistant, reliable and extremely strong sealing, under the manufacturer's strict quality control testing to ensure that this part can be used for a long time Easy Installation: First, carefully remove the old Water Filter O-Ring using an Water Filter O-Ring pick or similar tool, thoroughly removing all silt, sand and sediment from the groove. Then lightly but thoroughly lubricate the o-ring and clean threads with Vaseline and carefully screw on the housing with the new filter. Be sure to lubricate around the rubber to ensure an airtight seal! Note: The o-ring gasket, which is used to seal the bottom of the housing to the top of the housing, should be lubricated with a silicone lubricant to prevent leakage from the water filtration system. The OR-34 seal should be replaced every two filter changes or if the OR-34 seal is damaged. O-Ring Information: OR-34 / OR-34A O-Rings Compatible with Culligan Filters Upon purchase, you will receive 1 set of new OR-34 / OR-34A O-Rings (includes 2 O-Rings, 1 smaller “A” O-Ring and 1 larger “B” O-Ring)). “B” O-ring), which prevents water leakage from the filter housing Compatibility: OR-34 / OR-34A O-Ring, compatible with Culligan and Ace filters, fits Culligan HF-150(A), HF-160, HF-360(A), etc., fits U25 Omni Whole House Filter Housings, American Plumber WVC34 and Whole House Filters Excellent performance: O-ring replacement parts are made of high quality synthetic rubber, wear-resistant, reliable and extremely strong sealing, under the manufacturer's strict quality control testing to ensure that this part can be used for a long time Easy Installation: First, carefully remove the old O-ring using an O-ring pick or similar tool, thoroughly removing all silt, sand and sediment from the groove. Then lightly but thoroughly lubricate the o-ring and clean threads with Vaseline and carefully screw on the housing with the new filter. Be sure to lubricate around the rubber to ensure an airtight seal! Note: The o-ring gasket, which is used to seal the bottom of the housing to the top of the housing, should be lubricated with a silicone lubricant to prevent leakage from the water filtration system. The OR-34 seal should be replaced every two filter changes or if the OR-34 seal is damaged.