The tenants complaint when we arrived today was that the hot water started working but that the showers and he Roman tub when you turn them on for hot water only cold comes out We tested and found that the showers and the tub the hot and cold are backwards The guest bathroom shower is backwards because the handle was installed upside down After testing the master bathroom we believe that the hot and cold lines were swapped at some point in time because the hose bib on the outside wall of the house next to the master bathroom has hot water coming out of it My recommendation is to cut into the wall and find where the lines are and swap them back We did remove the handle and reinstall properly on the guest bathroom shower and that fixed the issue Job not completed Estimates built and ready No visible clean out