The Pentair 98209800 High Flow Manual Air Relief Valve is an essential component designed to enhance the efficiency of high-flow pool and spa filtration systems. Constructed from durable plastic, this manual air relief valve features a clean white finish and is specifically engineered for easy integration into filtration setups. Its primary function is to allow for the manual release ... https://www.usapoolshop.com/98209800-pentail-high-flow-manual-air-relief-va