We have 1 shower head that continually leaks and in another bathroom the tub faucet leaks. A pressure relief valve was placed on the house. We switched Moen cartridges twice. We tried adjusting PRV went all the way down to 20 psi and it still leaks.
Initially the house didn't have a PRV and when it was first installed, the leaking stopped but only for a few weeks and then came back in the same manner as it appeared. Slow drips that increase to a constant leak. What could be the problem?