Skip to main content
Moen Solutions

Shower Faucet: Leaking Issues- Moentrol with Integrated Transfer Valve

This article provides information on the most common causes of leaking issues with a vertical spa system 3320, 3330 or 3350 Moentrol with Integrated Transfer Valve. This will include continuous leaks and only when using the shower system.
Symptom   Solution

Continuous Leaking 24/7

The shower system continues running or dripping 24/7 with the handle in the off position.

Repair the lower handle cartridge using the 92451 or 1225 cartridge.

Water leaks from around one of the handles

When the water is turned on and you see water coming out from around the upper or lower handle.

Replace the cartridge for the handle that is leaking:

Water leaks from one device while using other device

Water leaks from shower device while running independent functions after diverting it to the other shower device.

Replace the upper diverter cartridge:

For additional information on Moen products visit 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.

Still Not Finding What You're Looking For?

Contact Us or Call 1-800-BUY-MOEN           

Non US?  Moen Canada | Other International Sites 

  • Was this article helpful?