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Hot water tempering valve?

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  • Hot water tempering valve?

    I got called to a restaurant they had interimintant hot water. Boiler was fine heated to thermostat temperature and shut off then relitwhe it cooled enough. It ran hot then would cool very quickly. I think it is either a bad check valve or a bad tempering valve or both.

    Will a tempering valve allow cold water through to the hotside or is there an internal check valve?

  • #2
    Re: Hot water tempering valve?

    The ASSE 1070s have integral check valves, the ASSE 1017s don't.

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