For this job it was to replace the hot and cold shower stems, I was able to successfully remove and replace the hot side with a brand new gerber stem, there is no further leak from that. However the cold side stem will need to be chipped away from the back side to remove the stem and reason is due to fact that mortar is blocking the the nut to get it out. Y recommendation is to remove the drywall on the backside and chip the mortar from the back side and then replace the stem. At this time the homeowner wants to think it over and wait to do that. I am charging half due to the fact that I only did have of the Job. Water pressure is at 75 psi.