How to Replace a Kitchen Faucet Yourself and Save Hundreds

A dripping kitchen faucet isn't just annoying — it can waste over 3,000 gallons of water per year and add $50 or more to your annual water bill. And that outdated, lime-crusted faucet from 2009? It's dragging down your entire kitchen's look every single day.

Here's the good news: replacing a kitchen faucet is one of the most satisfying DIY projects you can tackle. It requires no special skills, costs a fraction of what a plumber charges, and can be done in about 90 minutes to two hours. Most plumbers charge $200–$350 for labor alone on a faucet swap. With a new faucet ($150–$400 for a quality model) and a free afternoon, you can handle this yourself and pocket the savings.

I've replaced more faucets than I can count — in my own homes, for family, and as part of kitchen refreshes. This guide walks you through every step, from choosing the right replacement to that satisfying moment when you turn the handle and everything works perfectly.

What You'll Need: Tools and Materials

Before you crawl under the sink, gather everything so you're not making trips to the garage mid-project. There's nothing worse than lying on your back in a cabinet and realizing you need a tool that's 50 feet away.

Tools

• Basin wrench (this is the single most important tool — don't skip it)
• Adjustable wrench
• Channel-lock pliers
• Flashlight or headlamp (a headlamp is far better since it keeps your hands free)
• Bucket and old towels
• Plumber's tape (Teflon tape)
• Penetrating oil (like PB Blaster or WD-40 Specialist)
• Putty knife or plastic scraper

Materials

• New kitchen faucet (with supply lines — most modern faucets include them)
• Plumber's putty or silicone caulk (check your faucet's instructions)
• New supply lines if your faucet doesn't include them (braided stainless steel, not plastic)

A basin wrench typically costs $10–$20, and it's the one specialty tool that makes this job possible. It's designed specifically to reach up behind the sink and grip those hard-to-reach mounting nuts. If you try to do this job without one, you'll spend three times as long and probably scrape your knuckles raw.

Choosing the Right Replacement Faucet

Before you buy, you need to know what you're working with. Head to your sink and answer these three questions:

How Many Holes Does Your Sink Have?

Look at your current setup and count the holes in your sink or countertop. Most kitchen sinks have either one hole, three holes, or four holes.

• Single-hole sinks are the most common in modern kitchens. They take a single-handle faucet or a two-handle faucet with a deck plate.
• Three-hole sinks typically accommodate a two-handle faucet (hot on one side, cold on the other, spout in the middle) or a single-handle faucet with a deck plate covering the extra holes.
• Four-hole sinks add a spot for a side sprayer or soap dispenser.

The easiest replacement route is matching the same hole configuration. You can cover extra holes with a deck plate (also called an escutcheon), but you generally can't add holes without specialized tools.

What's Your Supply Line Setup?

Look under the sink. You'll see two supply lines (hot and cold) coming from shut-off valves on the wall. Note whether the valves are compression fittings or threaded, and check the size — most residential kitchen supply lines are 3/8-inch compression. Your new faucet's supply lines need to match these connections.

What Features Matter to You?

Modern kitchen faucets in 2026 offer some genuinely useful upgrades over what was available even five years ago:

• Pull-down sprayers are now standard on most mid-range faucets and are incredibly useful for rinsing dishes and cleaning the sink
• Touchless activation has gotten much more reliable — brands like Moen and Delta have refined their sensors significantly
• Magnetic docking keeps the sprayer head snapped in place instead of drooping over time
• Spot-resistant finishes (like Moen's Spot Resist or Delta's SpotShield) actually work and save you from constantly wiping fingerprints

For most homeowners, I recommend spending $180–$300 on a pull-down faucet from a major brand. Moen, Delta, and Kohler all offer excellent options at this price point with solid warranties. Avoid no-name brands under $80 — the cartridges and finishes tend to fail within two to three years.

Step-by-Step: Removing the Old Faucet

This is usually the hardest part of the job, not because it's complicated but because old connections can be stubborn and the workspace is cramped. Take your time here.

Step 1: Shut Off the Water

Turn off both shut-off valves under the sink by rotating them clockwise until they stop. Then turn on the old faucet to release any remaining pressure and confirm the water is off. If your shut-off valves are old gate valves that don't fully stop the water, you'll need to shut off the main water supply to your house.

Place a bucket under the supply line connections and lay towels on the cabinet floor. Even after you think you've drained everything, water will drip out when you disconnect the lines.

Step 2: Disconnect the Supply Lines

Using your adjustable wrench, loosen the supply line nuts where they connect to the shut-off valves. Turn counterclockwise. Let the residual water drain into your bucket. Then disconnect the supply lines from the faucet itself — this is where your basin wrench earns its keep.

Reach up behind the sink with the basin wrench, grip the supply line nut on the faucet, and turn counterclockwise. The basin wrench's swiveling jaw is designed to work in exactly this awkward, upside-down position.

Step 3: Remove the Mounting Nuts

With the supply lines disconnected, use the basin wrench to remove the mounting nuts that hold the faucet to the sink. There may be one large center nut or two separate nuts depending on your faucet style.

Pro tip: If the mounting nuts are frozen with corrosion, spray them with penetrating oil and wait 15 minutes. Seriously — patience here saves you from stripped nuts and broken fittings. I once spent 45 minutes fighting a corroded nut that 10 minutes of penetrating oil would have solved.

Step 4: Lift Out the Old Faucet

Once the mounting nuts are off, the faucet should lift straight up and out. If it's stuck, gently rock it side to side while pulling up. There may be old plumber's putty or caulk holding it down — slide a putty knife under the base plate to break the seal.

Clean the sink surface thoroughly. Scrape off old putty or caulk with a plastic scraper (avoid metal scrapers on stainless steel or porcelain sinks). A little rubbing alcohol on a rag gets the last residue off nicely.

Step-by-Step: Installing the New Faucet

With the old faucet removed and the sink surface clean, you're past the hard part. Installation is more straightforward because everything is new, clean, and designed to go together.

Step 1: Read the Instructions (Really)

I know — nobody wants to read instructions. But every faucet has slightly different mounting hardware, and spending five minutes with the manual now prevents 30 minutes of confusion later. Lay out all the parts, identify each one, and confirm nothing is missing.

Step 2: Apply the Gasket or Putty

Most modern faucets come with a rubber or foam gasket that sits between the faucet base and the sink surface. If your faucet includes one, use it — just set it in position.

If there's no gasket included, roll a rope of plumber's putty about 3/8-inch thick and press it around the base of the faucet. When you tighten the faucet down, the putty will squeeze out slightly around the edges. That's normal — you'll clean it up later.

Some manufacturers specifically call for silicone caulk instead of putty, especially on granite or marble countertops. Follow what the instructions say.

Step 3: Feed the Lines Through and Set the Faucet

Thread the supply lines and any sprayer hose down through the sink hole from above. Lower the faucet into position and press the base firmly against the sink surface.

Have a helper hold the faucet straight and centered from above while you go underneath to secure it — or use painter's tape to temporarily hold it in place if you're working solo.

Step 4: Secure the Mounting Hardware

From below, slide on the mounting bracket and washer (if applicable), then hand-tighten the mounting nut. Once it's snug by hand, use your basin wrench to tighten it another quarter to half turn. You want it firm but not over-tightened — cranking too hard on a porcelain sink can crack it.

Check from above that the faucet is still centered and straight before doing the final tightening.

Step 5: Connect the Supply Lines

Connect the hot supply line to the hot shut-off valve and the cold to the cold valve. Hot is typically on the left. Hand-tighten the connections first, then use your wrench for a snug quarter turn past hand-tight.

Wrap the threads with two to three layers of plumber's tape (Teflon tape) before connecting if the fittings are threaded rather than compression. Wrap the tape clockwise around the threads so it doesn't unravel as you tighten the nut.

Step 6: Connect the Sprayer Hose

If your new faucet has a pull-down sprayer, the hose typically connects to the faucet body with a quick-connect fitting underneath the sink. You'll hear and feel it click into place. Give it a firm tug to confirm it's locked. Attach any included counterweight to the hose — this is what retracts the sprayer head smoothly.

Testing and Troubleshooting

You're almost done. This final stage is about making sure everything works and nothing leaks.

The First Turn-On

Remove the aerator from the faucet spout (it usually unscrews by hand). This prevents any debris in the lines from clogging the aerator screen right away.

Slowly turn on both shut-off valves. Then slowly turn on the faucet — start with cold, then hot. Let the water run for 30 seconds to flush any debris from the lines.

While the water is running, grab your flashlight and check every connection point underneath for drips:

• Where the supply lines meet the shut-off valves
• Where the supply lines connect to the faucet
• Around the mounting nut and faucet base
• At the sprayer hose connection

Common Leak Fixes

Drip at a supply line connection: Turn off the water, tighten the nut an additional quarter turn, and test again. If it still leaks, disconnect, confirm the tape is applied correctly (or that the compression fitting isn't cross-threaded), and reconnect.

Water seeping around the faucet base: This means the gasket or putty isn't sealing properly. Tighten the mounting nut a bit more. If it persists, you may need to remove the faucet, reapply putty, and remount.

Low water pressure: Check that both shut-off valves are fully open. Remove and clean the aerator — debris from installation commonly lodges there.

Sprayer won't retract: Make sure the counterweight is installed on the hose and positioned about 6 to 8 inches from the connection point. Check that the hose moves freely and isn't kinked or caught on anything under the sink.

Once everything checks out, reinstall the aerator, clean up any excess putty that squeezed out around the base, and wipe down your new faucet.

Pro Tips to Make This Job Easier

After doing this job many times, here are the tricks that make the biggest difference:

• Take a photo of your old connections before disconnecting anything. This gives you a reference if you get confused about which line goes where.
• Use a headlamp, not a flashlight. You need both hands free under the sink, and holding a flashlight in your teeth gets old fast.
• Put a folded towel or piece of cardboard on the cabinet floor. Your back will thank you — you'll be lying on it for 20 to 30 minutes.
• Spray penetrating oil on old connections immediately. Even before you start other prep work, hit those old nuts with oil and let them soak while you organize your tools.
• Don't reuse old supply lines. They cost $8 to $12 each and new braided stainless lines are far more reliable than old ones. Most new faucets include supply lines anyway.
• Test the faucet's operation before final tightening. Once the water is on and you've confirmed no leaks, try all the faucet functions — handle movement, sprayer, and hot/cold operation. It's easier to make adjustments before everything is fully cinched down.
• Keep the receipt and warranty card. Major brands like Moen and Delta offer limited lifetime warranties. If a cartridge fails in three years, you can often get a free replacement part.

Replacing a kitchen faucet is one of those rare projects where the result is immediately visible, practically useful, and genuinely saves you money. You'll use your new faucet dozens of times a day, and every time you do, you'll know you installed it yourself. That's a pretty great feeling — and it's just the beginning of what you can accomplish in your kitchen with a little confidence and the right tools.