Check Valve R172248 for Pentair Rainbow Automatic Chlorine Bromine Feeder 320 Features: 1. Application: Replacement for pentair 320 chlorinator part is designed to use for pentair rainbow automatic chlorine/bromine in-line pool and spa feeder model 320. 2. Function: This check valve is designed to be a restrictor valve to restrict the amount of water that goes into the container, supposed to close not letting water go back to your pool. .
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