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Thread: Moen Posi-Temp Shower Faucet

  1. #1
    DIY Junior Member ptim's Avatar
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    Default Moen Posi-Temp Shower Faucet

    Very much a noob here. I have a Moen shower faucet, that has an issue, when you turn the water on, start spinning right to left, going through cold water, then into hot, as it starts its fine, but when it gets half way, the water get slower coming out, and the handle kinda gets easier to turn, almost like it gets loose. I took the handle off, but not all the way, to the valve, the plastic parts look fine, could the valve be bad.

    Plus its starting to leak.
    Last edited by ptim; 11-07-2012 at 06:09 PM.

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Most shower valves don't do just cold, but may get to all hot. So, you've got water coming through from both the hot and cold supplies but when you get closer to the hotter end, you start to shut off the cold. Using both supplies will produce more potential volume than just one (in this case the hot).
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    In the Trades Towers Plumbing's Avatar
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    Sounds like a Moen positemp valve cart 1222. That cart has a ball that moves back and forth depending on pressure to keep the water at the same temperature. Overtime, if the valve is not used alot, the ball can stick. This creates the effect you are describing. Sometimes taking out the cartridge and slamming it on a counter top can break the ball free, then use a silicone spray to keep it lubed or you can call Moen and get a new cart.

    Last edited by Terry; 11-13-2012 at 04:55 PM.

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    DIY Junior Member chopped's Avatar
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    Not to Hi Jack this thread but I found it after posting mine.A quick question for me is there a NON temp valve replacemtn for this? Thanks..

  5. #5
    Plumber jimbo's Avatar
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    Quote Originally Posted by chopped View Post
    Not to Hi Jack this thread but I found it after posting mine.A quick question for me is there a NON temp valve replacemtn for this? Thanks..
    No. The Positemp was the improved version of the older non-pressure-balanced, "pull-out" Chateau. But NONE of the parts are not interchangeable and it would be a code violation to take out the posi and replace it with an old style valve.

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