Designed for reliable air relief and smooth water circulation, this valve is compatible with Warrior, EasyClean Aboveground, EasyClean, FNS, FNS Plus, SMBW 2000 and 4000 Series and spa D.E. filters. Also fits Clean and Clear CCP100, CCP320, CCP420, CCP520, Quad DE 60/80/100 and all Filters. Open the air relief valve until air is fully released from the pool or spa filter. Once a steady of water appears, turn the valve back to the closed position. This ensures there is no air left in the filter tank, promoting effective filtration, quieter operation and extended equipment life. This pool filter air relief valve simply screws onto the filter body, so you can complete installation in minutes. Wrap the gauge plug and valve threads with tape, slide the rubber O-ring onto the tail end, then insert into the filter port to achieve a tight seal and help prevent water or air leaks. Made of , solid plastic that resists deformation and cracking, this manual air relief valve is built for long-term use in harsh pool and spa environments. Two internal non-slip rubber O-rings enhance sealing, helping the valve maintain stable performance even under high pressure and frequent adjustments. Package includes high manual relief valve, 190058 pressure gauge, gauge plug, O-ring, clip for quick reference. Compact design measures, ideal for most pool and spa filter setups.