The Hayward CCX1000V XStream Cartridge Filter Manual Air Relief Valve with O-Ring is a vital accessory designed to enhance the performance and maintenance of Hayward XStream Cartridge Filters. This manual air relief valve, available in durable plastic or brass, is specifically engineered to facilitate the efficient release of trapped air within the filtration system, ensuring optimal ... https://www.usapoolshop.com/ccx1000v-hayward-xstream-cartridge-filter-manual-air-relief-valve-with-o-ring