[RV40600 (98209800) Brass Air Relief Valve Replacement Model] Our brass manual air relief valve is compatible with all pool filter systems, for FNS, Clean and Clear, Quad DE, and 4000 Series Filters.Please confirm whether the model is suitable before buying. [Premium Material] Our RV40600 brass air relief valve is made of sturdy brass material to ensure durability and long-lasting performance. RV40600 98209800 brass air relief manual valve assembly is well made and the pressure gauge reads accurately with low error. Pressure range of 0-60psi ensures efficient cleaning. [Easy to Install] The RV40600 air release valve replacement is very easy to install and no needs for any actual tools. Remove only the old brass manual air relief valve assembly. Wrap the gauge threads with Telflon tape and screw the gauge onto the top of the brass air relief valve. Place the o-ring on the end of the brass air relief valve and screw the assembled brass air relief valve into the top of the filter to the proper position and angle, and make sure it is tight enough to vent and release excess air. (Tip: O-ring already attached to the end of the brass air relief valve) [RV40600 Brass Air Relief Valve Assembly] Our RV40600 brass air relief valve replacement parts with strong sealing, no leakage, no noise when working, so that your pool sand filter system can work well. When in use, turn the air relief valve until you hear air being released from the filter. After air and water have been ejected, turn the valve back to its original position. The pressure relief valve will ensure that there is no air in the filter. [Package Include] You will receive a brass air relief valve, come with pressure gauge, O-ring, for pool filter systems ( FNS, Clean and Clear, Quad DE, 4000 Series Filters)