So your kitchen faucet has seen better days. Maybe it’s dripping constantly, leaving that annoying stain in the sink, or the finish is peeling off and making the whole counter look tired. Or perhaps you just want a shiny new model with a pull-down sprayer or touchless technology. Whatever the reason, replacing a kitchen faucet is one of those DIY projects that looks a lot scarier than it actually is. With a little patience and the right preparation, you can swap out that old fixture in a couple of hours and feel like a plumbing hero.

Before you run to the hardware store, take a good look at your current setup. The most important thing to know is how many holes your sink or countertop has. Most kitchen sinks come with either one, two, or three holes cut out for the faucet. A single‑hole faucet needs exactly that—one opening. If you have three holes, you can install a faucet that includes a side sprayer, or you can get a deck plate (sometimes called an escutcheon) that covers the extra holes if you want a single‑hole look. Measure the distance from the back of the sink to the edge of the counter, too—you want to make sure the new faucet’s base will fit without overlapping anything.

Next, gather your tools. You don’t need a truckload of fancy equipment. Grab a basin wrench (that long‑handled tool that reaches up under the sink), an adjustable wrench, a bucket, some plumber’s putty or silicone caulk (depending on your faucet’s instructions), and maybe a flashlight because it gets dark under there. Also pick up a roll of Teflon tape—that white plumber’s tape that helps seal threaded connections. And have a towel or two handy because water will drip no matter how careful you are.

Now, start by turning off the water supply. Under your sink you’ll see two shutoff valves—one for hot, one for cold. Turn them clockwise until they stop. Then open the faucet handles on top to relieve any pressure in the lines. Let the water run for a few seconds until it stops completely. If your valves are old and stuck, you can always turn off the main water shutoff for the house, but that’s a last resort.

Once the water is off, disconnect the supply lines. Use your adjustable wrench to loosen the nuts that connect the flexible hoses to the shutoff valves. Have that bucket ready because a little water will still come out. Then slide the bucket underneath the faucet area to catch drips from above. Now you need to remove the old faucet. Reach under the sink with your basin wrench and loosen the mounting nuts that hold the faucet in place. These are usually big, plastic or brass nuts threaded onto the faucet’s shanks. You might need to get a good grip and turn counterclockwise. If they’re really stuck, a little penetrating oil can help, but usually slow pressure works.

With the nuts off, lift the old faucet straight up from above. It might be stuck from years of grime or old putty, so a gentle wiggle usually does the trick. Clean the area around the sink holes thoroughly—scrape off old putty, sealant, or mineral deposits. If you’re switching from a three‑hole setup to a single‑hole faucet, now’s the time to install the deck plate.

Take your new faucet out of the box and read the instructions. They’re not always the most exciting reading, but they’ll tell you if any parts need to be pre‑assembled. Most faucets come with rubber gaskets that go under the base to create a watertight seal. If the instructions say to use plumber’s putty instead, roll a thin snake of putty and press it around the base before lowering the faucet into place. Gently push the faucet down so the gasket or putty squishes evenly.

Now go back under the sink. Slide the mounting washers and nuts onto the shanks from below and hand‑tighten them. Then use your basin wrench to give them a final snug—just enough that the faucet doesn’t wiggle. Overtightening can crack the sink or strip the plastic nuts, so “snug” is your friend.

Attach the supply lines. Most new faucets come with flexible braided hoses already attached, so you just need to connect the other ends to your shutoff valves. Wrap a couple of layers of Teflon tape around the valve threads, then screw on the hose nuts hand‑tight and give them a quarter turn with the wrench. Don’t overdo it—these are sealing connections, not lug nuts on a car.

Before you turn the water back on, open the new faucet handles all the way. This helps prevent air hammer and lets water flow smoothly. Turn the shutoff valves slowly counterclockwise. You’ll hear air and maybe a sputter, but let the water run for a minute to flush out any debris. Check all the connections—under the sink, around the base, and at the sprayer if you have one—for drips. If you see a tiny weep, tighten that connection just a hair more.

Once everything is dry and tight, give yourself a pat on the back. You’ve just done a job that most people pay a plumber a couple hundred bucks to handle. And the best part is, you know exactly how your new faucet is put together, so if anything ever goes wrong, you’ll feel confident diving back under that sink. Now go wash your hands in that beautiful new water flow.