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Preparation and Water Shut-off — 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

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Before starting, go under the sink and shut off both the hot and cold water supply valves. Place a towel under the pipes to catch any water that will spill. Go back to the faucet and turn the handle on, moving it between hot and cold, to relieve any remaining pressure in the lines.

Goal: Shut off water supply and relieve pressure

  • Ensure both hot and cold water valves are fully closed before proceeding.

Used in this video

  • Towels/Rags (Material: Fabric)Catching water spills under the sink.
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This Old House

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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
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Let's get started. First thing we want to do is get underneath the sink and shut off our water supply, both hot and cold. I'd like to suggest you may be lay down some towels because we're going to get a little bit of water that leaks out from this hose when we end hook it. Also turn the faucet on, go between cold and hot just to get rid of any leftover pressure.

Auto-generated transcript. May contain errors.