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Thread: Hot water at cold side all faucets

  1. #1
    DIY Junior Member ben1111's Avatar
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    Default Hot water at cold side all faucets

    Hello,

    I have a home in Chicago that has hot water to all faucets on cold side. There are Grohe thermostatic valves at all showers (4). Only recent work was a new water heater 3 months ago. I am at a loss any help would be appriciated! Thanks in advance!

    Ben

  2. #2
    Plumber Esquire's Avatar
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    Were they normal at some point? If just one of those faucets was failing there could be a potential cross connection. I have seen a couple of occassions where this has happened, but it has usually been with a cheap brand faucet.

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    TROJAN WORLDWIDE SALES RP MACPLUMB 777's Avatar
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    Or more likely eather the water heater was hook up wrong i have seen even professional

    plumbers do this !

    Or you could be missing the dip tube ?

    If this problem started about same time as wtr/htr was changed out that is where you

    need to start looking !

    MACPLUMB 777

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    TROJAN WORLDWIDE SALES RP MACPLUMB 777's Avatar
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    Check your messages on your profile page ! ! !

    MACPLUMB 777

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    35 YEAR MASTER PLUMBER, HEATING, ELECTRIC, DRAINS, FIRE SPRINKLERS, WATER HEATER
    AND BOILERS SINCE JAN, 1989

    281-706-1631 7 DYS A WEEK SALES AND TECH. SUPPORT
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  5. #5
    Moderator & Master Plumber hj's Avatar
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    Reversing the connections to a water heater does NOT change the hot/cold orientation of the faucets. ALL it does is reduce the amount of hot water available. Changing hot to cold, and vice versa, requires a piping change somewhere.

  6. #6
    Plumber jimbo's Avatar
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    Do you have any kind of recirulating system? A failed check valve or improperly installed system could be a problem. If you have a retrofit recir, then warm to hot at the cold tap is a normal side effect. If you run a cold tap for a few minutes, does it turn cold, or stay hot?

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    DIY Junior Member ben1111's Avatar
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    Thanks for the replies. There is not a recirc line, and the water heater was replaced 3 months ago and worked fine untill three days ago. I think that the check valves in one of the Grohe thermostatic mixing valve hav gone bad allowing the water to pass? They are all about 4 years old. I have read that the washing machine selonoid gould also be bad. I will look further into this, and hape to find a resolution to it.

    The water will eventually get "cold", but stays warm for a while!

  8. #8
    Moderator & Master Plumber hj's Avatar
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    Washing machine solenoid valves CANNOT cause the problem, regardless of what you have heard.

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