Question about Moen S3371 ExactTemp ¾” Thermostatic Rough-In Valve

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Installed "upside down"

I have a problem regarding my recent installation of the Exacttemp shower valve: I accidentally installed the valve "upside down", meaning rotated 180 degrees, such that the tub outlet now faces up, and the shower outlet faces down. I capped the down-facing shower outlet and am using the original tub outlet (facing up) only, regulated by three flow valves (to shower, tub, and handheld). My question is: If I adapt the hot and cold water inlets, can I leave the valve in upside down or do I need to redo the install? Thanks for all and any help!

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Posted on Jan 02, 2017

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SOURCE: not alot of hot water?

1st Check the temperature restricting coller behind the cover under the handle. It is used to restrict the flow of hot water to stop you from being scaulded.
2nd Those set screws will control the flow. Check to ensure both sides are open the same amount of turns. If the water pressure is good turn in the cold side.

Posted on Jan 09, 2009

  • 102 Answers

SOURCE: low water flow in Shower

Definitely try reversing the cartridge.

Posted on Mar 11, 2009

  • 349 Answers

SOURCE: We have a home that

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

Posted on Aug 15, 2010

  • 642 Answers

SOURCE: Problem: Spout on Moen

The rotating spout is one of the features of the product as listed here. You can download the exploded parts view as well if you're not sure you got the assembly right.

Posted on Oct 17, 2010

  • 7 Answers

SOURCE: Moen Refresh? Shower Head 3-Way

Hi Rebecca,

Sorry to hear that your shower head hose is leaking. If you could please provide a few details to our Consumer Services team, someone can help you reach a solution. You can either visit or call 1-800-BUY-MOEN.

-Olivia from Moen

Posted on Jan 06, 2011

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The valve is installed upside down and needs to be reversed. There is a diverter in the valve that gives the spout priority. When the valve is upside down it gives the shower head priority. Thats why it runs without the diverter being activated. You will need to get in the wall from one side or the other. Cut the valve out and either flip the faucet Or change the direction of the diverter depending on the style of valve.

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