Replace a kitchen faucet yourself — removing the old one, seating the new deck plate, connecting supply lines, and the rusted-nut trick that saves the day.
A dated, drippy kitchen faucet makes the whole sink area feel tired — and a new pull-down faucet is one of the most satisfying one-hour upgrades in the house. The install itself is genuinely simple. The fight, when there is one, is always the same: getting the OLD faucet off, because its mounting nut has spent a decade rusting in a dark, cramped cabinet.
Here's the full swap, the tools that make the cramped part easy, and the situations where a stuck valve or crumbling supply line means it's time to call for help.
Tools and materials
- The new faucet (check how many holes your sink has — 1 to 4 — and match or use the included deck plate)
- A basin wrench — the $15 tool designed exactly for the nut you can't reach
- Adjustable wrench and channel-lock pliers
- New flexible supply lines (don't reuse 10-year-old ones)
- A bucket, towels, a flashlight or headlamp, and penetrating oil for rusted nuts
Step 1: Shut off the water and relieve pressure
Close both shut-off valves under the sink — hot and cold — then open the faucet to drain the pressure. If a valve won't close fully (very common on older Tampa homes where valves seize in the humidity), don't force it until it snaps; shut off water at the main and plan to replace that valve while you're in there. Put the bucket and a towel under the work area; there's always residual water.
Step 2: Disconnect the supply lines and sprayer
Use the adjustable wrench to disconnect both supply lines from the faucet tailpieces (not the valve end first — less drip). If your old faucet has a side sprayer or a pull-down hose, disconnect its quick-connect or hose weight too. Keep the bucket under every joint you crack open.
Step 3: Remove the old faucet (the hard part)
Behind the sink basin, the faucet is held by one or two mounting nuts threaded onto its shanks. This is basin-wrench territory: lie on your back, get the light pointed up, and let the basin wrench's pivoting jaw grab the nut where your hands can't. If the nut is rusted solid, hit it with penetrating oil, give it ten minutes, and try again. Once the nuts are off, lift the old faucet out from above and scrape the old caulk or gunk ring off the sink deck.
Step 4: Set the new faucet
Drop the new faucet's hoses and shanks through the hole (with the deck plate and its gasket if you're covering extra holes). Center it, square it to the backsplash, and tighten the mounting hardware from below — most modern faucets use a plastic wing nut or a bracket-and-screw system that's far friendlier than what you just removed. If the deck plate doesn't have a gasket, run a thin bead of silicone under it so Tampa's hard-water splash doesn't creep underneath.
Step 5: Connect the supply lines
Connect the new supply lines — hot to hot (left), cold to cold (right) — hand-tight plus a quarter to half turn with the wrench. Don't crank braided lines; the rubber washer does the sealing, not brute force. For pull-down models, connect the sprayer hose's quick-connect and clip on the counterweight so the head retracts properly.
Step 6: Flush and test
Unscrew the aerator or sprayer head, open both valves slowly, and run the faucet for 30 seconds — this flushes any debris from the lines so it doesn't clog the new aerator (the #1 cause of 'my new faucet has weak pressure'). Reinstall the head, then check every connection with a dry paper towel: run water, swipe each joint, and look for any damp spot. Check again after an hour.
When to call a pro
- Shut-off valves that won't close or that weep after reopening — replacing them is quick for a pro and a flood risk for a first-timer.
- Corroded supply lines, a rusted-solid mounting nut that won't break free, or a faucet fused to the sink deck.
- Adding a soap dispenser, filtered-water tap, or garbage disposal air switch at the same time.
- A new sink hole layout that doesn't match the faucet (drilling stainless or granite is specialty work).
Faucet dripping but otherwise fine? A cartridge swap may be all it needs: How to Fix a Leaky Faucet
Sink draining slowly while you're under there? Clear it properly: How to Unclog a Drain
Upgrading the dishwasher too? Here's the full install guide: How to Install a Dishwasher
Rather not wrestle the basin wrench? See our faucet service: Faucet Replacement in Tampa
Frequently asked questions
- How long does it take to replace a kitchen faucet?
- About an hour for a straightforward swap with working shut-off valves. Budget extra time if the old mounting nut is rusted (penetrating oil and a basin wrench usually win) or if you're also replacing seized shut-off valves — common in older Tampa homes.
- Do I need a plumber to replace a kitchen faucet?
- Usually not. If the shut-off valves work and you have a basin wrench, it's a very doable DIY job. Call a plumber or handyman if the valves won't close, the supply lines are corroded, or the old faucet's hardware won't break loose.
- What is a basin wrench and do I really need one?
- It's a long-handled wrench with a pivoting jaw made specifically to reach the faucet mounting nuts in the cramped space behind a sink basin. For removal of an older faucet, yes — it turns the worst part of the job into a two-minute task and costs about $15.
- Why does my new faucet have low water pressure?
- Almost always debris from the supply lines caught in the new aerator or spray head. Unscrew the aerator, flush the faucet for 30 seconds, rinse the screen, and reinstall. Flushing before first use prevents it entirely.
- Should I replace the supply lines when replacing a faucet?
- Yes. Braided supply lines are cheap, and old ones are the most common source of under-sink floods. While everything is disconnected is exactly the right time — never reuse decade-old lines on a new faucet.
Want a new kitchen faucet installed, leak-tested, and the old one hauled off — without the under-sink wrestling match? Call or text (786) 509-5555 for a free quote. Get a faucet replacement quote.
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