Step-by-Step DIY Faucet Installation Guide: Save Time and Money

A dripping, corroded or dated faucet is one of the most common reasons homeowners pick up a wrench. In most cases, swapping a sink faucet for a new one in the same holes is a manageable weekend project. This DIY faucet installation guide covers the tools, the steps and the warning signs that mean it is better to call a licensed plumber. Read through the whole thing before you start, along with the instructions that came with your faucet, since designs vary.

Is this a DIY job for you?

A faucet swap is usually a good DIY candidate when:

• The new faucet uses the same number of holes and spacing as the old one
• The shutoff valves under the sink work and close fully
• The supply connections are standard and in good condition
• You can work comfortably on your back inside a sink cabinet

Call a pro instead if the valves are seized, the pipes are corroded or the sink is changing configuration. Our guide to hiring a plumber for fixture replacement explains which jobs are better left to a licensed plumber.

Tools and materials

• The new faucet with all included parts, laid out and checked
• Basin wrench for nuts in tight spaces behind the sink
• Adjustable wrench and a second wrench to hold fittings steady
• Screwdrivers
• New braided supply lines if they are not included
• Plumber’s putty or silicone, only if the instructions call for it
• Flashlight or headlamp
• Bucket, towels and a small tray for parts
• Safety glasses and gloves
• A cleaning pad or plastic scraper

Step 1: Clear the cabinet and shut off the water

Empty the sink cabinet and lay a towel on the cabinet floor. Close the hot and cold stop valves by turning them clockwise until snug. Do not force a valve that will not move. Open the faucet to relieve pressure and confirm the water is off.

If there are no individual stops, or they will not close, shut off the main water supply to the house.

Step 2: Take a photo, then disconnect the supply lines

Snap a picture of the connections before removing anything. Place the bucket under the valves. Hold each valve steady with one wrench and loosen the supply line nut with another. Some water will drain out.

If the old faucet has a pull-down sprayer, disconnect the hose from the supply connection and remove the counterweight.

Step 3: Remove the mounting hardware

From beneath the sink, use the basin wrench to loosen the nuts or mounting bracket holding the faucet to the sink or countertop. Mineral buildup from hard water can make these stubborn. Apply steady pressure rather than sudden force, especially on porcelain or composite sinks.

Step 4: Lift out the old faucet and clean the surface

Pull the faucet straight up. Scrape away old putty, caulk and mineral deposits with a plastic scraper, then wipe the surface clean and dry. A clean surface is essential for a watertight seal.

Step 5: Set the new faucet

Follow the manufacturer’s sequence:

1. Place the gasket or deck plate, or apply the specified sealant.
2. Feed the supply lines and hoses through the mounting holes.
3. Center the faucet and check it faces the right way.
4. From below, install the washers and mounting nuts or bracket. Hand-tighten, then snug with the basin wrench. Do not overtighten, which can crack the sink or distort the faucet.

For pull-down kitchen faucets, attach the spray hose and clip on the counterweight at the point shown in the instructions.

Step 6: Connect the supply lines

Attach the hot line to the left valve and the cold line to the right, unless the instructions differ. Start each nut by hand to avoid cross-threading, then snug it with a wrench about a quarter turn past hand-tight. Hold the valve steady with a second wrench as you tighten.

Step 7: Flush and test for leaks

Remove the aerator from the spout. Open the stop valves slowly and run hot and cold water for a minute to flush debris. Reinstall the aerator. Then, with a dry paper towel, check every connection: valves, supply nuts, the faucet base and the sprayer hose. Check again after an hour and the next morning.

If a connection drips, tighten it slightly. If it still leaks, shut off the water and reseat the connection.

When to stop and call a plumber

• A shutoff valve will not close, or leaks once turned
• Pipes beneath the sink are corroded or crumble when touched
• The drain assembly is damaged or leaking
• A connection keeps leaking after reseating
• You find water damage, soft cabinet floors or mold under the sink

Our guide to the benefits of professional faucet installation explains what you gain with a pro install.

Make your new faucet last

Central Florida’s hard water is tough on faucet cartridges and aerators. Clean the aerator every few months, wipe down the finish and watch for scale. If buildup comes back quickly, read why Florida homes need water softeners.

Professional help when you want it

K&K Plumbing provides faucet installation and repair across eight Central Florida counties. Homeowners near Lake County can see our Leesburg faucet services.

Ran into a stuck valve or a leak that will not quit? Call or text 352-810-9472. We will finish the job, replace any worn valves and give you the price before we start.