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The faucets on my laundry tub need to be replaced. I'm trying to figure out how to shut of the water supply to the hot and cold lines. There are two valves(maybe?) inline on each of the water lines right above the tub (shown in the attached picture). Are these shut-off valves? If not, what is the purpose of these? I don't see any other shut-offs on these water lines between the tub and the main pipes that go along the ceiling.

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  • Those aren’t valves. They are plugged spigot adapters, at some point in the past there were spigots or planned spigots where u see the square faced plugs. Water can pass freely behind.
    – Tyson
    Commented Apr 23, 2018 at 15:55
  • @Tyson Thanks. That was my hunch. Just wanted to get a second opinion before I went turning them.
    – PICyourBrain
    Commented Apr 23, 2018 at 18:07

2 Answers 2

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Either

  1. Shut off the main valve (stopcock) for the building. If necessary drain pipes. Or

  2. Buy a pipe-freezing kit. Prepare thoroughly. Have a plan B. Work fast.

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  • Thanks for pointing out the pipe-freezing kit idea. I never realized that existed. Might not be worth it for this job but good to known for the future!
    – PICyourBrain
    Commented Apr 23, 2018 at 18:08
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I agree with the first answer. These are not valves, but plugs. You will have to turn the water off up-stream if not at the main.

These plugs are for convenience if you ever want to branch off from these lines. A threaded fitting can go where these plugs are currently.

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