We purchased our home earlier this year and the upstairs shower has an issue where the water comes out of the shower faucet and shower head at the same time and this is before I pull up the plunger on the faucet. When I pull up on the plunger, the water does what is should and comes out of the shower head only. It is a Price Fister brand and I went to the local hardware store and purchased a new "cartridge" and replaced it, but that did not fix the issue. Currently, I do not have access "inside the wall" to see the plumbing configuration. I would have to cut a service entry. We do have quarter turn valves in the basement that turns off the water to the shower. Any help or advice is greatly appreciated!!