273564Z Manual Air Relief Valve, including 2 sets of large and small Each consumable O-ring washers and anti loosening nuts;Thickened material, The thickened material of the valve body is not easy to break. 273564Z Clear Manual Air Relief Assembly Used with the following Filters: Triton C TR100C/TR140C and Triton C-3； The 273564Z Manual Air Relief Assembly Replacement Pool and Spa Sand Filter. Fits Clean & clear aboveground, clean & clear plus, clean & clear/predator pool and spa cartridge filters. Also fits Warrior, Easy-Clean Aboveground, Easy-Clean, FNS Plus, SM & SMBW 4000 Series pool and spa D. E. filters. Please confirm that it meets the specifications of the parts you need before purchasing. For the installation method, please refer to YouTube. 273564Z Manual Air Relief Valve Used with the following Filters: Triton C TR100C/TR140C and Triton C-3.