I have searched the other posts but did not find the answer to my question.

I have a leaking shower head and don't know how to stop it. I have a tub faucet with a built in diverter and thought that the diverter had malfunctioned so I replaced the faucet. Still leaking.

Could it be in the manifold behind the wall? Any direction would help, seems how I don't know what to do next.