• Manufacturer: Waterway 

• Type: Replacement O-ring 

The Waterway 805-0207B air relief valve o-ring is the tank body o-ring for the Proclean cartridge filter. O-rings can wear and warp over time, which can cause air and water leaks in the filter. Water leaks can unnecessarily damage surrounding equipment. O-rings should be replaced once damaged to prevent further damage to other equipment.