Behind wall water leak Tub/Shower Mixer

[rick2995]

Scenario: My home built in '70s, with craw-space Issue is water-leakage at mixer. Tub/Shower fixture is likely original which is a Moen Single Handle Pull Push/Turn. No leakage at Shower-head or Sprout. From Crawl-Space I can view supply-lines up until there are fished through the 2x4, NO Leakage when handle is in the Off Position. Leakage When handle is in On-position Cold-water, there is a steady-drip. At the Hot-Position the drips are less but are constant, same as when the diverter is in Shower position.

• Question: Is the issue likely caused by the Moen cartridge.

 

[hj]

Take the large chrome trim plate off and LOOK at the cartridge and/or find the leak.

 

[Sponsor]

 

[Terry]

It could be the cartridge, or the tub diverter spout.

 

[rick2995]

Take the large chrome trim plate off and LOOK at the cartridge and/or find the leak.

Thank you HJ... I happened to be in the crawl space concerning air-ducts when I heard water dripping .. I appreciate the suggestion.

 

[rick2995]

It could be the cartridge, or the tub diverter spout.

Hello Terry Thank you for the advise. In the event the cartridge is the issue Are the cartridges universal... let's say I find a 1125 or what ever in the mixer..and the best available cartridge in-town is a 1200 or so.. Will I be good to go with the higher numbered cartridge..?
Thank you
Rick

 

[rick2995]

Hello Terry and hj .. After removing the "Plate" and enlarging the openig to view the plumbing Mixer valve, I ran Cold followed by Hot with the Shower Deverter in Tub position and No Leaks observed, I then ppulled-Up on diverter valve for Shower-mode and "leakage" at the male inlet to the Mixer. Whats occurring is with the Shower in operation water pressure build-up at the mixer. ( No leaks from the Moen Cartridge or the Spout)
The Opening to the mixer is 4" circumferance with Ceramic-Tile surface. I hope you tell me a "Plumber can do the Job " without the need to ng to remove Tiles, morter and backing.. At bottom of mixer where inlet meets the mixer is the famous leak.