Learn How To Replace a Faucet
Knowing how to replace a faucet starts with knowing how to get the old one off. This is the hardest part of the job.
Get your basin wrench and a can of WD40 and some kind of foam pillow to cushion your back to make this project as painless as it can be.
First you need to turn off the water supply at the shut off.
The easiest place to shut it off is right under the sink you are working on but if there is no shut off there, you’ll have to turn off the house water supply at the meter.
If the drain lines and P-trap are hampering your work area, just disconnect them for the time being. Use a rag to block off the main drain to keep sewer gases out.
It's always wise to put the plug in the sink while you work on it...trust me on this one.
Now turn the faucet that you are replacing on momentarily to relieve some pressure (the faucet pressure not your own).
Time to get out that basin wrench and take off those nuts that are holding the faucet down. Most faucets are top mount, meaning the fasteners are under the counter .
Once in a while, you’ll have a bottom mount faucet, in which case, you will find the nuts under the escutcheon. To get to them, remove the handles first then unscrew the plate. These types show how to replace a faucet the easy way.
So that’s all there is to faucet removal. The difficulty is that sometimes those nuts are corroded and won’t come off.
If this is your case, put some WD40 on them and let it penetrate for a couple minutes and then try again.
If still this doesn’t work, you’ll have to get a hacksaw and saw the nuts off my friend.
Reconnect your drain lines and P-trap if you removed them earlier.
After you’ve wrangled the nuts off and removed the old faucet, you may see a ridge built of soap and mineral deposits outlining where the escutcheon was. To remove this use a 50/50 water to vinegar solution, let it sit for a bit then a razor blade should easily scrape that up.
Now it’s time to put in the new faucet.
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