Replacing a faucet is one of the most common home improvement projects, and for good reason. Whether your old faucet is leaking, corroded, or simply outdated, a new faucet can transform the look of your kitchen or bathroom while improving functionality. According to the Home Depot faucet buying guide, the average homeowner can expect a kitchen faucet to last 15-20 years, so choosing the right replacement and installing it properly matters. This guide walks you through every step of the process, from selecting the right faucet to avoiding costly installation mistakes.
Types of Faucets
Before you start shopping, it is important to understand the different types of faucets available and which ones are compatible with your sink setup.
Kitchen Faucets
- Single-handle faucets: One lever controls both hot and cold water. These are easy to use and have a cleaner look.
- Double-handle faucets: Separate hot and cold handles offer more precise temperature control.
- Pull-down faucets: The spray head pulls down directly from the faucet body, ideal for rinsing dishes and cleaning the sink.
- Pull-out faucets: The spray head pulls out toward you on a hose, great for filling large pots.
- Commercial-style faucets: High-arc gooseneck designs with coil-spring spouts for a professional kitchen look.
Bathroom Faucets
- Centerset: Handles and spout are mounted on a single base plate, fitting sinks with three-hole 4-inch configurations.
- Widespread: Handles and spout are separate pieces, allowing flexible placement on 8-inch or greater configurations.
- Wall-mount: Mounted on the wall above the sink for a clean, modern look.
- Vessel: Taller faucets designed to reach over vessel-style above-counter sinks.
Mounting Configurations
The number and spacing of holes in your sink or countertop determines which faucet type you can install. Count the holes and measure the distance between them before purchasing. A centerset faucet replaces a 4-inch three-hole setup, while a widespread faucet fits an 8-inch three-hole setup. If your sink has a single hole, you can use any single-hole faucet, and many two-handle faucets include an optional escutcheon plate to cover extra holes.
Tools and Materials Needed
Having the right tools on hand before you start will save time and frustration. Here is what you will need for a standard faucet installation:
- Adjustable wrench or basin wrench
- Plumber's tape (Teflon tape)
- Plumber's putty or silicone caulk
- Bucket and towels for catching water
- Flashlight or headlamp for under-sink visibility
- Channel-lock pliers
- Phillips and flat-head screwdrivers
- Supply lines (if your new faucet does not include them)
- Old rags to protect the sink surface
Step-by-Step Faucet Installation
Step 1: Turn Off the Water Supply
Locate the shut-off valves under the sink and turn them clockwise until they stop. If your sink does not have individual shut-off valves, you will need to turn off the main water supply to your home. Open the faucet to relieve any remaining water pressure and confirm the water is fully off.
Step 2: Remove the Old Faucet
Disconnect the supply lines from the shut-off valves, then disconnect the mounting nuts holding the old faucet in place from underneath the sink. A basin wrench is invaluable here because it is designed to reach into the tight space between the sink basin and the wall. Pull the old faucet out from above and clean any old plumber's putty or caulk from the sink surface.
Step 3: Install the New Faucet
Following the manufacturer's instructions, apply a bead of plumber's putty to the base of the faucet (or use the included rubber gasket). Insert the faucet through the mounting holes from above, pressing down firmly to create a seal. From underneath, thread the mounting nuts onto the faucet studs and hand-tighten, then finish with a wrench. Be careful not to overtighten, as this can crack the sink or damage the faucet base. For more on this and other common mistakes, see our article on DIY plumbing mistakes that cost homeowners thousands.
Step 4: Connect the Supply Lines
Attach the hot and cold supply lines to the faucet tailpieces and the shut-off valves. Wrap the threads with plumber's tape to ensure a watertight seal. Hand-tighten the connections, then give each one a quarter turn with a wrench. Avoid overtightening, which can strip threads or crush washers.
Step 5: Check for Leaks
Turn the water supply back on slowly, checking all connections for leaks as the water flows. If you see any drips, tighten the connection slightly. Run both hot and cold water for several minutes to confirm everything is working correctly. The This Old House faucet installation guide recommends leaving the water running for at least five minutes to flush out any debris from the new faucet's aerator.
Common Faucet Installation Mistakes
Even experienced DIYers make errors during faucet installation. Watch out for these common pitfalls:
- Overtightening connections: This is the number one mistake. Overly tight connections can crack fittings, strip threads, and crush rubber washers, leading to hidden leaks that cause water damage over time.
- Forgetting plumber's tape: Skipping Teflon tape on threaded connections often results in slow leaks that appear days or weeks later.
- Using the wrong supply lines: Make sure your supply lines are the correct length and diameter. Braided stainless steel lines are more durable than plastic or rubber.
- Not cleaning the sink surface: Old putty and caulk residue prevents the new faucet from sealing properly, leading to water seepage under the faucet base.
- Mixing up hot and cold: Double-check that hot water connects to the left valve and cold to the right. This is a code requirement in most areas.
- Ignoring clearance issues: Make sure the faucet spout has enough clearance for your largest pots, and that the handle has room to operate without hitting the backsplash.
For a deeper dive into these and other costly errors, check out our full guide on common DIY plumbing mistakes.
When to Hire a Professional
While faucet installation is a manageable DIY project for many homeowners, some situations call for professional help:
- You discover corroded or damaged pipes when removing the old faucet
- The shut-off valves are stuck or leaking and need replacement
- You need new supply lines run or plumbing relocated
- You are installing a wall-mount faucet, which requires cutting into the wall
- Your sink has non-standard hole configurations
- You simply do not feel confident working with plumbing connections
A botched faucet installation can lead to slow leaks that cause thousands in water damage before you even notice. If you are unsure about any aspect of the job, our professional faucet installation services are just a phone call away.
Key Takeaways
- Count your sink holes and measure hole spacing before buying a new faucet
- Always shut off the water supply before starting any faucet work
- Use plumber's tape on all threaded connections to prevent leaks
- Hand-tighten connections first, then give a quarter turn with a wrench—never overtighten
- Run water for several minutes after installation to check for leaks and flush debris
- Call a professional if you encounter corroded pipes, stuck valves, or non-standard configurations
- A properly installed faucet should last 15-20 years with basic maintenance
Ready for a New Faucet?
Whether you need help choosing the right faucet or want a professional to handle the installation, GoPlumberz connects you with licensed plumbers who get the job done right. We also handle related issues like clogged drains and other plumbing repairs. Call (888)239-9523 today to get connected with a plumbing professional in your area.