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Demolish Old Plumbing — Install and Plumb New Valve

Intermediate

Part of project

How to Convert a 3-Handle Shower Faucet to a Single-Handle Valve · Step 4 of 7

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In this video

Ensure the main water supply is turned off. Inside the wall, use pipe cutters to cut the hot and cold water supply lines and the shower riser pipe connected to the old valve. Remove the old valve from the wall. Then, use an oscillating tool to cut and remove the old wooden support beam that the valve was mounted to.

Goal: Remove old valve and supports

  • Double-check that the water is completely off before cutting any pipes. Open a lower-level faucet to drain the lines.
  • Have a bucket or towels ready to catch any residual water in the pipes.

Used in this video

  • Pipe Cutters (brand: Channellock)Cutting the existing polybutylene or PEX pipes.
  • Oscillating Multi-Tool (brand: Milwaukee)Cutting the wooden support beam for removal.
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FAQs

How challenging is this conversion for an intermediate DIYer, and what's a realistic time frame?

This project is rated intermediate due to the necessary plumbing and wall repair. While feasible for a dedicated DIYer, expect it to take a full weekend or several evenings, especially if you encounter unexpected plumbing configurations or need to learn new techniques. Adequate planning and preparation can significantly reduce the overall time.

What critical safety precautions should I take when working on this plumbing project?

Always shut off the main water supply to your house before starting any work to prevent flooding. Wear eye protection when cutting pipes or using power tools. Before cutting into walls, use a stud finder and potentially a non-contact voltage tester to avoid electrical wires or hidden pipes, which could cause injury or damage.

What are common pitfalls or mistakes DIYers make, and how can I avoid them during this valve conversion?

A common mistake is not fully draining the lines after shutting off water, leading to unexpected drips. Another is failing to adequately test for leaks before repairing the wall, which can cause significant damage later. Ensure all new connections are tight, test the system thoroughly for at least an hour before closing up the wall, and double-check pipe routing for any potential strain.

The project mentions specific tools and materials like push-to-connect fittings. Are these highly recommended, and what are their benefits?

Yes, specific tools like the GEARWRENCH Mini Tubing Cutter and Husky Reamer are crucial for clean copper pipe work. Push-to-connect fittings (e.g., QUICKFITTING) are highly recommended as they significantly simplify plumbing connections, eliminating the need for soldering tools and skills. This makes the project much more accessible and faster for DIYers while providing reliable seals.