Shower Faucet: Low Flow-Standard 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 Standard valve system. The characteristics of a Standard valve are it's push/pull handle, and a back escutcheon plate with the screws located at the bottom in the 5:00 and 7:00 position. This valve system utilizes a 1225 flow cartridge.

Symptom	Solution
Low Flow: Hot or Cold	Replace the 1225/1200 cartridge, see article 1225 Cartridge: Single Handle Shower-Standard Valve.
Low Flow: Hot and Cold	Confirm the handle is being pulled out all the way to turn the water on to full capacity. Replace the 1225/1200 cartridge, see article 1225 Cartridge: Single Handle Shower-Standard Valve.
No Flow	Confirm the handle is being pulled out to turn the water on 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 1225/1200 cartridge, see article 1225 Cartridge: Single Handle Shower-Standard Valve.

Low Flow: Hot and Cold

Confirm the handle is being pulled out all the way to turn the water on to full capacity. Replace the 1225/1200 cartridge, see article 1225 Cartridge: Single Handle Shower-Standard Valve.

No Flow

Confirm the handle is being pulled out to turn the water on

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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