Feather butterfly Replace Hayward Swimming Pool Filter air Relief Vent Valve w/o-Ring ecx1322a 3 Pack（Upgraded Material: Zinc Alloy）

["[About Material] ECX1322A Pool Filter Air Relief Vent Valve is made of Zinc Alloy, Product improvement which fits perfectly with the filter and can solve your problem well.","[Function] This exhaust valve is designed to effectively regulate the air in your sand pump, improving its performance and efficiency.Suitable for pool baffle housings to ensure their proper venting. Great replacement kit.","[Easy to handle] Simply screw into the filter housing and make sure the installation is tight, with O-ring to prevent leakage.","[Good Sealing] The pool filter cleaners are equipped with o rings,the rings can strengthen the connection between vent and vent valve, keep from leaking, these filter replacement part combinations are good choices for replacing filter accessories.","[Compatible] with cartridge filter C100, C250, C500, C750, extended cycle DE filter EC30 and EC40 series, EC50A/ AC series."]