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Old 01-28-2011
oldmansax oldmansax is offline
Black Sheep Division
Join Date: May 2010
Location: delaware
Posts: 1,147

Originally Posted by ewommack View Post
Where is the check valve located? I have already taken the cartridge out and tried to flush the spool out without the cardridge in. Still no luck. Pulling the inspection plate this morning to see whats behind it. I do have a new cartridge to go in the spool.
On mine, the check valve is in the right hand water pipe before it gets to the shower valve. It is a 11/16" plug looking device that has an adjusting screw in the middle. The screw adjusts the pressure on the check valve spring so it opens when you turn on the water & closes when you turn it off. I had to use a 3/8' drive, crow foot tubing socket to get it out.

1985 PT36
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