stesso

Project

Begin by turning off the water to the entire house. Locate your main water shut-off valve, which is often in a basement, crawl space, or near the water meter, and turn it clockwise until it stops. Open the shower faucet and the lowest faucet in your house (e.g., a basement sink) to completely drain the water from the supply lines. Place a drop cloth in the bottom of the tub or shower to protect the surface from scratches and falling debris.

You're viewing a step from: How to Convert a 3-Handle Shower Faucet to a Single-Handle Valve

Intermediate

30 minutes

2/4 Inventory

This project involves the complete removal of an old three-handle shower faucet system and replacing it with a modern, single-handle pressure-balancing or thermostatic valve. The process requires opening the wall behind the faucet, modifying the existing hot and cold water supply lines, installing the new valve body, and then repairing the wall and installing the new trim.

Based on content fromJosh Of All Trades· 585 subscribers

Frequently Asked Questions

Why is it crucial to completely shut off the main water supply before gaining access or cutting pipes?

Failing to shut off the main water supply will result in significant water damage and potential injury when you cut into the pipes. Always confirm the water is off by testing a faucet before proceeding.

What's the best technique for cutting a drywall access hole without causing excessive damage or hitting utilities?

Use a stud finder to locate studs and avoid cutting into them. For a clean cut, use a utility knife for initial scoring and then a drywall saw, cutting small, controlled sections to prevent hitting electrical wires or other hidden pipes.

How can I ensure I'm cutting in the right place to find the pipe without making unnecessary large holes?

Start with a small pilot hole to peek behind the drywall using a flashlight or borescope if available. Use a stud finder or thermal camera if you have one to help locate the pipe's general path before making a larger cut.

What are the key safety considerations when using a ladder and working in an attic space for pipe access?

Always ensure your ladder is stable on a level surface before climbing. In the attic, watch for uneven joists, exposed nails, and avoid stepping on insulation that doesn't support your weight to prevent falling through the ceiling.