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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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Turn off the water supply to the faucet by locating the shutoff valves under the sink and turning them clockwise.

Goal: Stop water flow to the faucet.

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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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So we need to replace the guts to this thing. We're going to go down below and shut off the water. Okay, there you go. First you should find out who made the faucet and usually it's printed

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