Reply To: Moen PosiTemp Tub/Shower Valve

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Bruce T

Hmm thats a good question!
They are pressure balancing valves that should shut down BOTH hot and cold if there was an ubstruction before the valve.
My guess is that the OUTLET of the stem itself has an obstruction.
shut down the house water and remove the stem and check it for debris.
When building a house with a pressure balancing spool, if you do not have the hot water hooked up the pressure balancing spool will shut down the cold water at the shower as well, thats why i’m thinking that the outlet of the stem has some obstruction.
Just my guess!
Also, I belive the posi-temps also have a scald gaurd dial just behind the handle that can be adjusted…all it does is stop the handle from going to full open hot position, this can be adjusted without shutting off the water.

» This message has been edited by Bruce T on 26 July 2002

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