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Clean the Sink Surface — Clean the Sink and Prepare for Installation

Beginner3 hours

Part of project

How to Replace a Bathroom Faucet: A Step-by-Step DIY Guide · Step 4 of 6

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In this video

With the old faucet removed, you will likely see residue from old plumber's putty. Use a plastic scraper or a putty knife to carefully scrape all of the old, hardened putty off the sink surface. Be careful not to scratch the sink. After scraping, use a sponge with some water or a mild cleaner to wipe down the entire area, ensuring it is clean and free of debris for the new faucet installation.

Goal: Prepare sink surface for new faucet

  • An old credit card or gift card makes a great scraper that is less likely to scratch a porcelain sink.

Used in this video

  • Putty Knife (Tool Type: Hand Tools)Scraping off old plumber's putty.
  • SpongeCleaning the sink surface after scraping.
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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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You get it off the rest of the way and then just pull it all out and see the old plumber's putty. You're going to want to scrape that off, put it in the trash and clean up the entire area.

Auto-generated transcript. May contain errors.