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Thread: Moen, Moen, moan . . .

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  1. #1
    DIY Junior Member utahtenorsax's Avatar
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    Default Moen, Moen, moan . . .

    I just bought an 11-year-old house with two widely separated bathrooms. Both shower stalls have the exact same Moen valves and symptoms. Turning on the shower produces really hot water in the center position, but only warm water in either the extreme right or left positions. Cold water is sometimes available for a few seconds at start-up, but that is obviously attributable to standing water in the pipe overnight.

    I have replaced many Moen cartridges in the past, have never seen one do this. I checked under the house for a tempering valve, but there are only supply lines. If there is a tempering valve, it would have to be hidden behind the shower wall and I can't imagine anyone burying one there.

    Well, duh. Maybe I should just install new cartridges and be done with it. It seems odd that both cartridges would fail at the same time.


  2. #2
    Plumber plumber1's Avatar
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    Replace um...........

  3. #3
    Master Plumber master plumber mark's Avatar
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    Talking moen cartridges

    they are probably those posi temp cartiriges

    wait till you see what they are goonna cost you...

    probably around 65-75 each......

  4. #4
    Plumber Cass's Avatar
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    If you live in a hard water area try soaking them in vinegar. I have done that more than a few times with great success.

  5. #5
    DIY Junior Member utahtenorsax's Avatar
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    Default Mysterious goings-on

    Replaced cartridges, had no effect. These are not Posi-Temp cartridges (which wouldn't fit these valves anyway), so I sit here scratching my head. All of the other faucets in this house are Moen cartridge valves and they do not have the same problem, so that rules out a piping mistake. It's looking more and more like some inventive plumber installed tempering valves in an inaccessible location.


  6. #6
    Plumber Cass's Avatar
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    Did you try turning them 180 degrees to see what happens?

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