I also have this reverse horror story, where I added a 1" water main shutoff below these clients' sink (see finished sink photo above).
Even to this day, the water in the 1" pipe behind the sink flows from below their unit to the unit above.
I was like, "Hey, if you don't ever need it, fine." But I thought they had the opportunity to put one in that controlled the water to their unit, but it simultaneously shut the water off to the above unit.
The entire building water was shutoff, and it was because I was replacing some faucet valves, or whatever.
Literally, the very next day, some construction workers sawed or drilled a giant hole in a pipe located in the unit above.
They were installing a hood, or something, and just cut a huge hole into the drywall with a sawzall, or drilled some clamps into it, or whatever.
Water was pouring out of every ceiling ventilation air register, every wall and crevice, bathroom, kitchen, bedroom, fireplace. I immediately ran upstairs, their door was wide open as they were running, trying to find something to do. I identified there was nothing they can do, so I returned to the shutoff the water. And that was it.
It was like a coincidence that I could run back downstairs and turn the shutoff that I had installed the previous day, no kidding.
It later turns out, we learned, that building maintenance personnel were in the garage replacing the main water valve because that didn't even work.
#residential #restoration #construction