... in operate system. Advantages Of SW-Cartridge FilterThe Filtration High Flow, SW-Cartridge housing has the unique design of assuring ... pressure from dislodging the elements from their respective seals. Cartridge filter can be equipped with back wash valves and ... choice.The following O-Ring options are available for the Cartridge Filter Housings: Viton (standard) ,EPDM, Buna, PTFE Encapsulated Viton ...