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Disconnect Water Lines — Disconnect the Faucet Supply Lines

Beginner3 hours

Part of project

How to Replace a Bathroom Faucet: A Step-by-Step DIY Guide · Step 2 of 6

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In this video

Working from the access panel, disconnect the hot and cold water supply lines from the back of the faucet. These swivel connectors are typically hand-tight. If they are too tight to loosen by hand, you can use a wrench or pliers, but be very careful not to crack or damage the plastic nuts.

Goal: Disconnect water lines

  • Use caution when applying a wrench to the plastic nuts to avoid overtightening or stripping them.

Used in this video

  • Wrench (Tool Type: Hand Tools) · optionalLoosening water line connectors that are too tight to undo by hand.
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FAQs

Why is a basin wrench listed as a required tool for this project?

A basin wrench is crucial because it's specifically designed to reach and loosen the mounting nuts that secure the faucet from underneath the sink. These nuts are often in very tight, awkward spaces where a regular adjustable wrench simply cannot fit or get enough leverage.

What should I do if the old faucet's mounting nuts are corroded and won't budge?

First, try applying a penetrating oil to the corroded nuts and let it sit for 15-30 minutes to help break down the rust. If they still won't turn, you may need to use a small hacksaw or a specialized nut splitter designed for plumbing to carefully cut through the nuts. Always wear eye protection when doing this.

Is 3 hours a realistic time estimate for someone who's never replaced a faucet before?

While 3 hours is a good estimate for an experienced DIYer, beginners should budget a bit more time, perhaps 4-6 hours. This allows for unexpected challenges like stubborn old parts, cleaning time, and carefully familiarizing yourself with the new faucet's instructions without rushing.

After installing the new faucet and turning the water back on, I have a small leak under the sink. What should I check first?

The most common culprits for leaks are loose supply line connections or improperly tightened mounting nuts. Gently but firmly tighten these connections with your adjustable wrench. If the leak persists, you may need to disassemble the connection, inspect the washers/gaskets, and reassemble with plumber's tape or a fresh application of plumber's putty if applicable.

Transcript
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pressure by opening the hot and cold valves on your faucet. The next step is to disconnect the water lines. These swivel connectors are typically hand tight, however you may need a wrench to loosen them. But be careful not to damage the plastic nuts. The next step is to remove the two mounting nuts. You can then remove

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