This injection nipple with 1/2 inch thread is used to inject chlorine, pH or pH+ into a swimming pool pipe. A flexible pipe can be attached to the nipple at the bottom of the injector, so that the final injection takes place further downstream from the injection point. This allows you to physically separate the injection of acid and chlorine. Inside the injection nipple is a rubber check valve, so that no pool water can escape through the injection nipple.
