I'm a plumber. A few weeks ago I had a call after midnight from a lady who had water leaking into her basement in a two family (upper/lower) home but didn't know where it was coming from. The water risers for the 2nd floor apartment run through a wall in the 1st floor kitchen. Over 15 years ago when the cabinets were installed in that kitchen the installer put a 2" long sheet rock screw to secure a cabinet through the hot water riser. I had to remove the cabinet and part of the tile wall to repair. The screw held until it finally withered away. After everything it ended up costing her just over $700 for repairs.I actually thought of this thread, yesterday when I was working in a hotel ,,, none of the pipes or wires were marked on the face of the sheet rock.... So when I went to cover over the sheet rock with a cement sheet I got a horrible feeling that there would be pipes in the wall, so I chopped a couple of inspection holes and boom a main water pipe .. And to add to it they had put screws into it... There were no leaks tho... So hopefully they just missed it
So hope like hell they missed it!