My newely installed tub/shower has a squealling noise when the shower is turned on.
It is a Moen valve and shower head and there is a loud squealling noise usually after
the water has been on awhile. Then goes away and comes back later. It almost always
makes this noise when you are shutting off the water. I changed shower heads but that
did not solve the problem. I'm wondering if it is the valve itself of should I try another
shower head? Has anyone else had this problem?