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Shower Faucet: Low Flow-PosiTemp Valve

Shower Faucet: Low Flow-PosiTemp Valve

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This article will help you determine the solution to the problem of a shower exhibiting low flow. This is based on the PosiTemp valve system. The characteristics of a PosiTemp valve are it's rotate only handle, and a back escutcheon plate with the screws located at the 2:00 and 7:00 position. This valve system utilizes a 1222 cartridge.

Symptom	Solution
Low Flow: Hot or Cold	Replace the 1222 cartridge, see article 1222 Cartridge: Single Handle Shower- PosiTemp.
Low Flow: Hot and Cold	Tub Spout and Showerhead- replace the 1222 cartridge, see article 1222 Cartridge: Single Handle Shower- PosiTemp. Shower only- check the flow rate on the showerhead.
No Flow	Tub Spout and Shower: Confirm both hot and cold supply lines are both turned all the way on. Shower only: Test the flow of water with the showerhead removed (through the shower arm). If you are getting good flow through the shower arm- clean the showerhead to remove any debris and replace if necessary. If there is still no flow, replace the cartridge.

Symptom

Solution

Low Flow: Hot or Cold

Replace the 1222 cartridge, see article 1222 Cartridge: Single Handle Shower- PosiTemp.

Low Flow: Hot and Cold

Tub Spout and Showerhead- replace the 1222 cartridge, see article 1222 Cartridge: Single Handle Shower- PosiTemp.

Shower only- check the flow rate on the showerhead.

No Flow

Tub Spout and Shower:

Confirm both hot and cold supply lines are both turned all the way on.

Shower only:

Test the flow of water with the showerhead removed (through the shower arm). If you are getting good flow through the shower arm- clean the showerhead to remove any debris and replace if necessary. If there is still no flow, replace the cartridge.

For additional information on Moen products visit solutions.moen.com and select the type of faucet you are repairing. The faucet guide will contain repair details, troubleshooting and specific information on assembling handles associated with that style of product.

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