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    dclynch's Avatar
    dclynch Posts: 202, Reputation: 19
    Full Member

    Jan 2, 2007, 01:25 PM
    Water Circulates Through Mixing Valve
    I've installed a Kohler Thermostatic Mixing Valve with Volume Control (K-404) in my shower construction project and just noticed that the hot water is circulating up through the valve and then back down the cold pipe! Yikes- this puts water from the hot water heater into the drinking water and seems like a big energy waster. I'm sure the valve is installed according to their directions and nothing is leaking. Reading further about how the mixer works, I can imagine how this happens. Seems to me that they should warn you about this.

    Is there anything practical I can do? What about a backflow valve on the cold water supply to the shower? Would it cut down on the flow? Putting one in at this point when most everything is covered would be a real pain, but is probably better than leaving the situation as is.
    dclynch's Avatar
    dclynch Posts: 202, Reputation: 19
    Full Member

    Jan 5, 2007, 09:50 AM
    Tom - Have you ever seen anything like this? Would the backflow device work? Thanks - Dennis
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber

    Jan 5, 2007, 03:57 PM
    No I haven't Dennis, This is a cross connection but I can't pull up a breakdown view of the faucet but if I were him I'd return the valve and ask for a replacment. Regards, tom

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