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Drain the Water Line — Preparation and Water Shut-Off

Intermediate12 hours

Part of project

How to Convert a 3-Handle Shower Faucet to a Single-Handle Valve · Step 1 of 9

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In this video

First, ensure the main water is shut off. Place a bucket under the existing angle stop to catch any remaining water. Disconnect the water supply line from the toilet and open the valve, allowing the water to drain completely into the bucket. Once drained, close the valve and place a rag on the floor to absorb any spills.

Goal: Safely drain residual water from the supply line.

  • Opening and closing the valve a few times can help ensure all the water is drained out.

Used in this video

  • Bucket (Tool Type: Hand Tools, Material: Plastic)Catching residual water from the supply line.
  • Rag (Tool Type: Hand Tools, Material: Fabric)Absorbing spills and wiping the area dry.
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FAQs

Given the 'intermediate' difficulty, what's the most challenging part of this conversion, and can I realistically finish it in 12 hours?

The most challenging aspects are accurately cutting and soldering copper pipes for the new valve, and then skillfully repairing the wall to a professional finish. While 12 hours is an estimate for experienced DIYers, expect it to take longer if you're new to soldering or drywall work, especially accounting for drying times for joint compound.

What are the essential safety precautions I must take when cutting and soldering plumbing, and opening up a wall?

Always shut off your home's main water supply completely before starting any plumbing work. When soldering, ensure good ventilation, wear eye protection, and keep a fire extinguisher nearby. Be extremely careful when cutting into the wall to avoid hidden electrical wires, gas lines, or other pipes.

The required tools list includes items like an awning and weatherstripping. Are these really necessary for this specific plumbing project?

Some items in the provided list, such as the awning, weatherstripping, and wall switch, appear to be irrelevant for converting a shower faucet. Focus on essential plumbing tools like a pipe cutter, reamer, soldering torch, copper fittings, flux, and solder, alongside basic carpentry tools for wall repair, and a drill/driver for mounting.

What's the most common mistake DIYers make when soldering copper pipes, and how can I avoid leaks?

A frequent mistake is not properly cleaning and fluxing the pipe ends and fittings before heating, which prevents a strong capillary bond. Ensure surfaces are shiny clean, apply flux evenly, heat the fitting (not the solder) until the solder flows into the joint, and avoid moving the joint until it cools to prevent pinhole leaks.

Drain the Water Line — How to Convert a 3-Handle Shower Faucet to a Single-Handle Valve (Step 1, Video 2) | Stesso