Skip to main content

Turn off water supply — Turn Off the Water Supply and Drain the Lines

Beginner3 hours

Part of project

How to Install a New Bathtub Faucet: A Step-by-Step DIY Guide · Step 1 of 4

Helpful?

In this video

Turn off both the hot and cold water supply lines to the faucet. This is usually done under the sink using the shut-off valves. Turning both off is recommended to prevent accidentally getting hit with hot water while disassembling the faucet. If you don't have shut-off valves, you will need to shut the water supply for the whole house before starting this process.

Goal: Stop water flow to the faucet

  • Make sure the water is completely off before proceeding.
125.7K views2271 minute
This Old House

2.2M subscribers

View Channel

FAQs

How realistic is the 3-hour estimate for a beginner, and what common issues might extend the installation time?

While 3 hours is a good estimate for an experienced DIYer, beginners should budget more time, perhaps 4-6 hours. Unexpected challenges like rusted connections, stripped screws, limited access, or needing to retrieve forgotten tools can significantly extend the process. Patience is key, as rushing can lead to mistakes.

What are the absolute essential safety precautions I must take before starting to install a new bathtub faucet?

Always turn off the main water supply to your home and fully drain the lines by opening a lower-level faucet before beginning to prevent flooding. Ensure the work area is dry and well-lit to avoid slips. Be mindful of any nearby electrical outlets, though direct electrical work is not part of this project.

What are the most common mistakes that lead to leaks after installing a new bathtub faucet, and how can I prevent them?

Leaks often occur from improperly tightened connections (either too loose or overtightened, stripping threads). Ensure all supply line connections are hand-tightened, then given a final quarter to half-turn with a wrench. Always use plumber's tape on threaded connections and plumber's putty where recommended by the faucet manufacturer for seals around the base.

Are there any additional tools or materials, beyond those listed, that would be helpful for a smoother bathtub faucet installation?

Yes, having a bucket or old towels for draining water and potential drips is essential. A flashlight for working in tight, dark spaces is highly recommended. Depending on your current setup, a basin wrench might be invaluable for reaching nuts in confined areas, and plumber's tape is usually needed for threaded connections.

Transcript
Hide

replaced so the first thing you want to do is turn the water off that leads to the faucet from underneath the sink both the hot and the cold because once you remove that cartridge it will be spewing water out and you just don't want to have it hit you in the face then on this

Auto-generated transcript. May contain errors.