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Turn off water supply — Turn Off the Shower's Water Supply

Beginner4 hours

Part of project

Shower Fixture Installation & Replacement: A Complete DIY Guide · Step 1 of 5

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Before starting the repair, make sure to shut off the water supply to the shower. Locate the main water shut-off valve for your home or the shut-off valve specifically for the shower. Turn the valve clockwise to shut off the water flow. Go to the lowest fixture near the shower and turn the faucet to drain any remaining water in the lines.

Goal: Stop water flow to the shower

  • Always turn off the water supply before starting any plumbing work to prevent flooding.
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This Old House

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FAQs

The project difficulty is listed as 'beginner' and estimated at 4 hours. Is this realistic if I've never done plumbing before?

While 'beginner' refers to the skills needed, plumbing can be unpredictable. Allow extra time, especially if you encounter old, stubborn fixtures or need to adapt to existing plumbing. Having the right tools and watching a few video tutorials beforehand will greatly increase your chances of success within the estimated timeframe.

My project lists a soldering torch, but I'm uncomfortable with soldering. Are there alternatives for connecting the new shower valve?

Absolutely! Many modern shower valves are designed for PEX or CPVC connections, which use crimp, push-to-connect (e.g., SharkBite), or solvent weld fittings. These methods are often more beginner-friendly than soldering copper pipes and eliminate the need for a torch, if your existing plumbing can be adapted.

What's the most common reason for leaks after installing new shower fixtures, and how can I prevent them?

Leaking typically occurs due to improperly tightened connections or damaged seals. Always apply plumber's tape (PTFE tape) or pipe dope on all threaded connections before tightening. Hand-tighten first, then use a wrench for another quarter to half turn, being careful not to overtighten and strip threads. Test thoroughly before closing up walls.

I can't find a specific shut-off valve for my shower. What should I do?

If your shower doesn't have dedicated shut-off valves, you'll need to turn off the main water supply to your entire home. Locate your main water shut-off valve, usually in your basement, utility closet, or near the water meter outside. Always confirm the water is off by checking other faucets before proceeding with any disassembly.

Transcript
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shower cartridge all right so before we even start taking this apart let's go down and shut off our water all right so as you can see i got a lot of christmas decorations around mine but here's my water valve i'm just going to shut this off now because there's always a little water in the line go ahead and bleed the line and i like to do it at the closest point to the shower

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