Customer has a leak coming from the master shower drain. After opening up the ceiling we noticed that the water was coming from around the shower drain itself and not leaking from the fittings. Shower drain was loose and the seal was broken. Resealed the shower drain and tested for leaks. Also replaced three shower cartridges. After install of the shower cartridges we pressurized the system, bleed the air, and tested for leaks. Thank you for choosing te certified.