Reply To: Cold Faucet On = Water out of Hot Pipe

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2 Jul 2003 at 3:25 am #294698
Avatar photonicktheplumber
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    I guess that some of your fixtures (sinks/showers/bathtubs) have “mixer” valves or “diverter” valves, and when you open the cold water side water is diverted back into the hot water supply lines…

    NtP

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