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Connect Water Supply Lines — Install the New Faucet

Beginner4 hours

Part of project

How to Replace an Outdoor Faucet (Spigot/Hose Bibb) · Step 4 of 6

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In this video

To ensure a watertight seal, wrap Teflon tape clockwise around the male threads of your hot and cold water supply valves under the sink. Connect the corresponding braided hot and cold supply lines from the new faucet to these valves. Hand-tighten the connections first, and then use an adjustable wrench to give them a final, snug turn, typically about a quarter-turn past hand-tight.

Goal: Connect Water Supply

  • Be careful not to over-tighten the connections, as this can damage the fittings and cause leaks.

Used in this video

  • Adjustable Wrench (Tool Type: Hand Tools, Wrench Type: Adjustable wrench)Tightening the water supply line connections.
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This Old House

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FAQs

How difficult is replacing an outdoor faucet for a beginner, and how long should I expect it to take?

This project is rated as 'beginner' difficulty, making it suitable for those new to DIY plumbing. With proper preparation and the right tools, it typically takes about 4 hours. Most of the time involves careful disconnection, preparation, and leak testing.

What are the most critical safety precautions I need to take before starting this project?

The most crucial step is to shut off the main water supply to your house and drain the lines before beginning. This prevents accidental flooding. Always wear safety glasses and gloves to protect against debris, tools slipping, or contact with old pipes.

What specific tools and materials are essential for this faucet replacement, especially for a stubborn old unit?

Beyond basic tools, you'll definitely need two sturdy pipe wrenches (like the RIDGID 31305 and TradesPro 830914) to safely remove the old faucet without twisting internal pipes. Penetrating oil (Blaster PB) is critical for seized connections, and Teflon tape along with pipe thread sealant (Hercules Real-Tuff) are essential for leak-free installation.

Why is installing a 'frost-proof' faucet recommended, and are there different types or considerations for them?

Frost-proof faucets are highly recommended because they prevent water from freezing and bursting the pipe inside your wall during cold weather, saving you from costly repairs. They come in various lengths, so measure the thickness of your exterior wall to ensure you select one that extends far enough into your house for proper function and drainage.

Transcript
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hose, then connect the hose to the other end of the adapter. Use Teflon tape when necessary. Connect the hot and cold supply lines and tighten with a wrench.

Auto-generated transcript. May contain errors.