[Good Fitment] 98209803 High Flow Manual Air Relief Valve Replacement, compatible with Warrior, EasyClean Aboveground, EasyClean, FNS, FNS Plus, SMBW 2000 Series and 4000 Series, Clean and Clear (CCP100, CCP320, CCP420, CCP520), Quad DE 60, 80, and 100, and various pool filters. Also compatible with above-ground pool and spa filters. [Perfect Compatibility] This 98209803 Air Relief Valve Assembly is compatible with part numbers 188592, 188593, 188594, 160316, 160317, 160318, 160301, 160332, 011555, 147411, 180007, 180008, and 180009. [High Performance] Designed to release air from the filter housing. Easy to install and operate—no tools required. Remove the existing valve, place the included O-ring onto the new valve, screw the top plug securely, then insert the assembly into the mounting location. During operation, open the air relief valve until air escapes; once water begins to flow, close the valve. [Superior Material] Constructed from durable plastic with excellent wear resistance and dimensional stability. Includes a rubber O-ring for enhanced sealing. Features a threaded top plug—unscrew to attach a pressure gauge (not included) for filter pressure testing. Color: As shown Material: Plastic Package Contents: 1 x High Flow Air Relief Valve Note: Slight color variations may occur due to lighting and screen settings. Measurements may vary by ±1–3 cm.