Compatible: DuPont WFHD1300, WFHD13001, Glacier Bay HDG4HS4, American Granby HFHPLD10BP, HFHPLD10BP20, HFHPLD10CP
Three per pack O-Ring
It is best to replace O-RING every 3-4 months, depending on the use environment, temperature, water quality pH influence. Maintain pump and filter performance and don't wait for water leakage before doing measures
O-Ring Is Made of Rubber, Replace the Sealing Ring Regularly, the Filter Can Be Sealed For a Long Time and Work Better