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Mazzei Venturi Ozone Injector Cap Red 14in 584684Mazzei Venturi Injector Cap 684KCAP Cap Only screws onto the red 684K ozone venturi to attach the ozone hose. Internal check valve with ball and spring design can fail over time or become calcified or corroded. Replace your venturi injector cap annually for best results with the check valve. Fits both 584 Black and 684 Red venturi injectors by Mazzei.
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