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Shut Off Water and Disconnect Faucet Line — 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

Before disconnecting any lines, locate the cold water shutoff valve under the sink and turn it to the off position. Place a bucket underneath the connection to catch any draining water. Using an adjustable wrench, carefully loosen and unscrew the flexible water line that connects the shutoff valve to the kitchen faucet.

Goal: Isolate the water supply and disconnect the existing cold water line.

  • Make sure the water is completely shut off to avoid water damage.
  • Having a bucket ready is essential to keep the cabinet dry.

Used in this video

  • Adjustable Wrench (brand: Unspecified, Adjustable Wrench Size: Medium (8-inch))Loosening the nut on the water supply line.
  • Bucket (brand: Unspecified)Catching residual water from the disconnected line.
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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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now and uh now I'm going to take a crescent wrench and undo my uh line right here my hose and then I'm going to uh have a bucket underneath this thing just to catch any water water comes out it's going to be a little bit make sure it's off uh and then Mount this thing and then uh should be good to go got my

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