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  1. Jim123

    Check valve for gravity hot water re-circulation

    In my house there’s a three-quarter inch copper supply line for the upstairs hot water in the bathrooms. At the end of that run I teed off a ½ inch PEX line which runs about 60 feet back to the water heater two floors down in the basement. In the basement, the PEX connects to a shut off valve...
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