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Prepare New Valve — Solder the New Valve

Intermediate16 hours

Part of project

How to Convert a 3-Handle Shower Faucet to a Single-Handle Valve · Step 6 of 9

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In this video

Prepare the new Delta valve for installation. First, unscrew the bonnet nut and remove the plastic test cap and internal cartridge. This is crucial to prevent the heat from soldering from damaging these plastic and rubber components. Using a wire brush, clean the inside of the three sockets (hot in, cold in, and shower out) on the valve body to prepare them for soldering.

Goal: Make the new valve ready for soldering

  • Failure to remove the cartridge before soldering will likely melt it, requiring a replacement.

Used in this video

  • Pliers (Tool Type: Hand Tools, Pliers Type: Slip Joint)Unscrewing the bonnet nut.
  • Wire Brush (Tool Type: Painting Tools, Cleaning Tool Material: Metal)Cleaning the inside of the valve's copper sockets.
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FAQs

This project is rated 'intermediate.' What specific skills or prior experience are essential for successfully converting a three-handle shower faucet?

An intermediate rating means you should be comfortable with basic plumbing tasks, including cutting pipes and making secure connections. Experience with soldering copper pipes is crucial, as the new valve typically requires soldered connections. You'll also need basic carpentry skills for opening and repairing the access wall.

The estimated time is 16 hours. What aspects of this conversion project take the most time, and can it be completed in a single weekend?

The 16-hour estimate accounts for significant stages like creating wall access, carefully removing the old valve, precisely soldering the new one, and thorough leak testing. Repairing and finishing the access wall also adds considerable time. While possible to do in a weekend, spreading it over a few days allows for drying times and meticulous work, especially for leak checks.

What are the critical safety considerations, especially regarding soldering and working with plumbing behind the wall?

Always turn off the main water supply before starting. When soldering, ensure excellent ventilation to disperse fumes and have a fire extinguisher nearby; protect surrounding studs with a heat shield. Wear appropriate PPE, including safety glasses and gloves. Thoroughly drain pipes to avoid steam buildup during soldering.

What are the most common mistakes DIYers make during this type of shower valve conversion, and how can they be avoided?

A common mistake is improper soldering, leading to leaks. Ensure pipes are clean, flux is applied correctly, and joints are heated evenly. Another error is not thoroughly leak testing before closing the wall; pressurized water should run for several hours. Also, double-check the new valve's orientation and depth before securing it.

Prepare New Valve — How to Convert a 3-Handle Shower Faucet to a Single-Handle Valve (Step 6, Video 1) | Stesso