I was lucky, when we went in to trim out I told the guys I had a bad feeling, re charge the lines. They did, and the pressure dropped. That was a clue something was wrong. Called the GC and told him to put a halt on work until we could fix it. He got pissed and blamed me! When he got there I showed him the inspectors report which showed it was holding 120 psi at the time of inspection! We found actually 2 leaks, the one behind the baseboard, and another in the kitchen where the cabinet man had driven a 4" screw into the wall about 2" away from the stud. Worst part was that the stud was visable because of where they removed the sheetrock and installed cement board for tile. If they had just opened their eyes they would had seen it. Oh well, mucho bucks for me!