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Shut Off and Drain Water Supply

2:57
8:10
118.9K views

At 2:57 in

No Hot Water In Bathtub But Hot Water In Sinks???

What happens here

Before performing any plumbing work, locate the main water shut-off valve for the house and turn it off. This is crucial to prevent flooding. Once the main supply is off, open a hot and cold water faucet at a lower level (e.g., a utility sink or basement faucet) to drain water from the pipes. Then, open an upstairs faucet to allow air into the system and further drain the hot and cold water lines connected to the mixing valve, relieving pressure and minimizing water spillage during replacement.

Goal: Safely prepare the plumbing system for valve replacement by isolating and draining water.

Tools and materials

  • Main Water Shut-off Valve — Controlling the water supply to the entire house

What they say

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change out. But you know what? Doing a couple stairs and going to hurt nobody, especially me at this point. So we got to go to the closet under the stairs for this one. All right, they put the shut off valves and the weirdest place is sometimes right down here is where it is. It always makes me laugh. We will open the hot and cold down low, get some of that draining. That way we don't get a bunch of water upstairs, opening upstairs faucet. Oh yeah, use a backup wrench for this, right?

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