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Prepare and Shut Off Water — Preparation and Safety

Intermediate

Part of project

How to Install a Two-Handle Shower Valve · Step 1 of 7

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In this video

Begin by preparing the work area. Place a bucket and a rag under the P-trap to catch any water spills. Locate the hot and cold water shut-off valves under the sink and turn them clockwise to shut off the water supply completely. Turn on the faucet to drain any remaining water and relieve pressure in the lines.

Goal: Shut off water supply

  • Taking a photo of the plumbing setup before you start is a great way to remember how everything connects.

Used in this video

  • BucketCatching water from the drain and supply lines.
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This Old House

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FAQs

What are the most critical skills and tools required for this project, especially for a beginner?

The most critical skill is copper pipe soldering, as the new valve needs to be securely joined. Essential tools include a pipe cutter (like the AUTOCUT 1/2 in. Copper Pipe Tubing Cutter), a soldering torch kit, flux, solder, and safety glasses (HDX Indoor Safety Glasses). Practice soldering on scrap pipe if you're new to it.

How can I ensure I don't cause water damage or other issues during installation?

Always shut off the main water supply to your house before starting any plumbing work. After soldering, pressurize the system and carefully inspect all new connections for leaks before closing up the wall. Use Kleenex Paper Towels to dab around joints and confirm they are completely dry.

What's a realistic timeframe and difficulty level I should expect for this shower valve replacement?

This project is rated intermediate due to the necessary soldering and gaining access to the plumbing within the wall. For an experienced DIYer, it might take 4-6 hours, but beginners should budget a full day (8+ hours) to account for learning, careful work, and potential troubleshooting.

Are there alternatives to soldering the new shower valve if I'm not comfortable with a torch?

Yes, you can use push-to-connect (e.g., SharkBite) or PEX crimp fittings as alternatives to soldering. These methods require different tools like a PEX crimper or just the specific fittings themselves. While often quicker, they can be more expensive than traditional copper soldering and may result in a bulkier installation.

Prepare and Shut Off Water — How to Install a Two-Handle Shower Valve (Step 1, Video 1) | Stesso