Feature Compatibility: R172248 check valve compatible with Pentair Rainbow automatic chlorine/bromine in-line pool and spa feeder model 320. High Quality Materials: The R172248 check valve is made of high quality plastic material and has excellent sealing properties. It can completely replace the original check valve.Replaceable part number: R172248. Function: R172248 check valve is located under the plastic screen at the bottom of the feeder.R172248 check valve prevents water from entering the in-line chlorine feeder from the return line. .
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