Question about Moen & Posi-Temp Single Handle Shower Or Tub Valve

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Posi temp valve has hot and cold water reversed.  When the water is turned on, hot water comes out first.  As the handle is turned further counter clockwise, it becomes colder until only cold as handle is turned to maximum position.

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  • Thomas F. Schneider May 11, 2010

    I do not believe it is reversable from  inside the valve, Can it be replumber from a basement, if you have one? If not you will have to replumb it from the back side of the shower wall?

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Shut off the water, pull the handle and turn the cartridge 180 degrees. then put it back together

Posted on Mar 03, 2009

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This is a very simple fix. NOTE: This is for a Posi-temp model only!! First turn off the house water. Relieve the water pressure at a nearby sink. Then remove the handle from the faucet. Remove the black plastic piece, then the two white plastic pieces (these control how hot the water gets by controlling how far the handle turns), then the metal cover over the center piece of the valve. Once these are out of the way, there is a small metal clip that you can see that holds the cartridge in place sitting in a **** on the top of the center piece. Remove this carefully with a small straight edge screwdriver, taking care not to lose it. Then with a small pair of pliers, pulling on the center of the cartridge, pull straight out. Once the cartridge is completely out, turn it counter clock wise, 180 degrees and then reverse the process. The hot/cold will be in proper location now.
Now for an older style, simply take the handle off, turn the center portion of the cartridge 180 degrees counter clock wise and return the handle. Hot/cold will now be in their proper locations.
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Remove handle to gain acess to the temperature limit stop. Remove handle and pull out handle adapter kit and next there is a dail that can be adjusted to control the water to balance the temp. It could have been installed wrong, pay attention to where it is now and pull it back to it disengages out of the stem and move it counter clockwise a little and reinstall. Put handle on and test water for correct movement.

Go to link below for a part's diagram if needed.

TO ORDER PARTS CALL: 1-800-465-6130
www.moen.com

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1 Answer

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Your Moen valve is equiped with an anti-scald device (as part of the valve cartridge) which prevents someone from getting scalded by hot water if there's a sudden demand for cold water, i.e. a toilet flush, washing machine filling, etc. Fortunately Moen stands behind their products and will provide a new cartridge.
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Jan 26, 2010 | Moen & Posi-Temp Single Handle Shower Or...

1 Answer

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You have to remove cartridge and rotate 180 degrees then re-install. Was it removed or replace lately?

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1 Answer

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turn the water off to the shower,sometimes you must shut down the whole house at the main ,near the water meter,then take the handle off slide the clip in front up and out then pull posi-temp straight out.replace posi-temp in reverse order.be mindful of the H/C indicator on posi-temp this will ensure you have hot and cold on right sides,if reversed just flip posi-temp.

Jul 08, 2009 | Moen & Posi-Temp Single Handle Shower Or...

1 Answer

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Did this unit come with water stops built into the faucet body? Some of the newer faucets have stops built in and they need to be turned on. Also if you aren't going to plumb the hot in, you will need to cap it off but it should run without it unless it has some sort of balance in it. I don't think so though.

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