How Do You Change Out a Kitchen Faucet Step-by-Step?

AvatarByAlison Socha Kitchen Upgrades & Fixtures

Upgrading your kitchen faucet can instantly refresh the look and functionality of one of the most used spaces in your home. Whether you’re aiming to enhance your kitchen’s style, improve water efficiency, or fix a persistent leak, knowing how to change out a kitchen faucet empowers you to tackle this common home improvement project with confidence. It’s a practical skill that not only saves money but also gives you the satisfaction of completing a hands-on task yourself.

Replacing a kitchen faucet might seem daunting at first, especially with all the plumbing components involved, but it’s a manageable job for most DIY enthusiasts. Understanding the basic steps and tools required can help demystify the process and set you up for success. From disconnecting old fixtures to installing new ones, each phase plays a crucial role in ensuring your faucet functions smoothly and looks great.

Before diving into the specifics, it’s helpful to get a broad overview of what the project entails. This includes familiarizing yourself with different faucet types, recognizing common challenges, and knowing what to expect during installation. With the right preparation and guidance, changing out your kitchen faucet can be a straightforward and rewarding experience that enhances your kitchen’s appeal and efficiency.

Removing the Old Faucet

Begin by shutting off the water supply valves under the sink. Turn the handles clockwise until fully closed. If your sink lacks individual shutoff valves, you will need to turn off the main water supply to the house. Open the faucet to release any remaining water pressure.

Next, disconnect the water supply lines from the faucet. Use an adjustable wrench or basin wrench to loosen the nuts connecting the supply lines to the faucet tailpieces. Have a bucket or towel handy to catch any residual water that may leak during disconnection.

After detaching the supply lines, remove the mounting nuts securing the faucet to the sink. These are typically located beneath the sink and may require a basin wrench due to tight spaces. Carefully loosen and remove all mounting hardware. Once freed, lift the old faucet straight up and away from the sink. Clean the sink surface thoroughly to remove old plumber’s putty or debris before proceeding.

Preparing for Installation

Before installing the new faucet, inspect the sink holes to ensure compatibility with the new unit. Most kitchen faucets require a standard three-hole configuration, but single-hole or four-hole setups exist. Use an escutcheon plate or deck plate if your faucet requires covering extra holes.

Check the new faucet’s parts against the manufacturer’s instructions. Confirm that you have all necessary components, including:

  • Faucet body
  • Mounting hardware (nuts, washers, gaskets)
  • Supply lines (if included)
  • Escutcheon or deck plate (if applicable)
  • O-rings and seals

Apply plumber’s putty or silicone sealant under the faucet base or escutcheon plate to create a watertight seal. Avoid using excessive amounts, which can squeeze out and cause a mess.

Installing the New Faucet

Position the faucet in the sink holes, aligning it carefully. Hold it in place while securing from underneath with the mounting nuts and washers. Tighten the nuts evenly to avoid distorting the faucet base or damaging the sink surface.

Attach the water supply lines to the corresponding hot and cold inlets on the faucet. Hand-tighten first, then use a wrench to snug the connections without over-tightening, which can damage threads or cause leaks.

Once all connections are secure, turn on the water supply valves slowly. Check for leaks at every connection point. If leaks appear, tighten the fittings slightly or reapply sealant as needed.

Step Key Actions Tools Required
Shut off water supply Close valves under sink or main supply, open faucet to drain None
Disconnect supply lines Loosen nuts connecting supply lines to faucet Adjustable wrench, basin wrench, bucket
Remove mounting hardware Loosen and remove nuts securing faucet to sink Basin wrench
Clean sink surface Remove old putty and debris Putty knife, cloth
Position new faucet Align faucet with sink holes and secure with mounting nuts Wrench
Connect supply lines Attach hot and cold lines, tighten connections Adjustable wrench
Test for leaks Turn on water and check all connections None

Additional Tips for a Smooth Installation

  • Work in a well-lit area and use a flashlight if necessary to see under the sink.
  • If working in tight spaces, a basin wrench is invaluable for accessing hard-to-reach nuts.
  • Consider replacing old supply lines if they show signs of wear or corrosion.
  • Use thread seal tape (Teflon tape) on threaded connections to prevent leaks.
  • Keep a towel or rag nearby to wipe up any drips during installation.
  • Before final tightening, confirm the faucet is properly aligned and level.
  • If you encounter stubborn mounting nuts, apply penetrating oil and allow time to work before attempting removal again.

Adhering to these guidelines will help ensure your new kitchen faucet is installed correctly and functions reliably for years to come.

Preparing to Remove the Old Kitchen Faucet

Before beginning the replacement process, ensure you have all necessary tools and materials at hand. Proper preparation minimizes complications during installation and helps maintain a clean work environment.

Gather the following tools and supplies:

  • Adjustable wrench or basin wrench
  • Bucket or towel to catch residual water
  • Plumber’s putty or silicone sealant
  • New kitchen faucet and compatible supply lines
  • Cleaning supplies such as a sponge or rag
  • Flashlight for better visibility underneath the sink

Locate the water shut-off valves under the sink and turn them clockwise to close. Open the faucet to release any remaining water pressure and drain residual water in the lines.

Clear the area beneath the sink to provide ample space for working. Position your bucket or towel to catch any leaks during disconnection of the supply lines.

Disconnecting and Removing the Existing Faucet

Proper removal of the old faucet is essential to avoid damage to the sink or plumbing.

  • Disconnect water supply lines: Using an adjustable wrench, carefully loosen the nuts connecting the supply lines to the faucet. Have a bucket ready to catch any trapped water.
  • Remove mounting nuts: Locate the mounting nuts securing the faucet beneath the sink. These are often tightened against a rubber gasket or metal plate. Use a basin wrench for hard-to-reach nuts.
  • Free the faucet: Once the mounting nuts are removed, gently lift the faucet from the sink deck. If the faucet is sealed with plumber’s putty or silicone, carefully break the seal without damaging the sink’s finish.
  • Clean the sink surface: Remove any residual putty or sealant using a putty knife or scraper. Clean the area thoroughly to ensure a proper seal for the new faucet.

Installing the New Kitchen Faucet

Installation requires careful alignment and secure fastening to prevent leaks and ensure longevity.

Step Action Details
Apply Sealant Prepare the base of the faucet Use plumber’s putty or silicone sealant as recommended by the faucet manufacturer to create a watertight seal between the faucet base and sink.
Position Faucet Insert faucet through sink holes Align the faucet with the mounting holes and insert it securely. Confirm that the faucet is oriented correctly relative to the sink and countertop.
Secure Faucet Tighten mounting nuts From beneath the sink, fasten the mounting nuts by hand initially, then tighten with a wrench until snug. Avoid overtightening to prevent damage.
Attach Supply Lines Connect hot and cold water lines Attach the supply lines to the faucet’s threaded inlets, tightening with a wrench. Confirm proper connection to corresponding hot and cold shut-off valves.

Testing and Final Adjustments

Once installation is complete, verify the functionality and integrity of the new faucet.

  • Turn on water supply: Slowly open the shut-off valves and observe the connections for leaks.
  • Check faucet operation: Test both hot and cold water flow, ensuring smooth handle movement and consistent water pressure.
  • Inspect for leaks: Look beneath the sink and around the faucet base. Tighten any loose connections if necessary.
  • Clean the work area: Wipe away any excess sealant and remove tools and debris.

Professional Perspectives on How To Change Out Kitchen Faucet

Linda Martinez (Certified Plumbing Technician, National Plumbing Association). Changing out a kitchen faucet requires careful attention to water supply lines and proper sealing to prevent leaks. I always recommend shutting off the water supply completely before beginning and using plumber’s tape on threaded connections to ensure a watertight fit. Additionally, selecting a faucet that matches your sink’s mounting holes simplifies installation and reduces the risk of damage.

James O’Connor (Home Improvement Specialist, RenovatePro Consulting). When replacing a kitchen faucet, it’s essential to assess the existing plumbing configuration and compatibility with the new fixture. Many homeowners overlook the importance of checking the water pressure and flow rate, which can affect faucet performance. I advise using adjustable wrenches carefully to avoid stripping nuts and to always test for leaks after installation before closing cabinets.

Sophia Chen (Licensed Master Plumber and Instructor, Plumbing Trade Institute). The key to a successful kitchen faucet replacement lies in preparation and the right tools. I emphasize removing the old faucet gently to avoid damaging the sink or countertop. Using a basin wrench is often necessary for tight spaces under the sink. Also, take the time to clean the mounting surface thoroughly before installing the new faucet to ensure a proper seal and long-lasting durability.

Frequently Asked Questions (FAQs)

What tools do I need to change out a kitchen faucet?
You will typically need an adjustable wrench, basin wrench, plumber’s tape, bucket, and a screwdriver. Some installations may also require a flashlight and silicone sealant.

How do I turn off the water supply before replacing the faucet?
Locate the shutoff valves under the sink and turn them clockwise to close. If there are no local shutoffs, turn off the main water supply to the house.

Can I replace a kitchen faucet without removing the countertop?
Yes, most kitchen faucets can be replaced from underneath the sink without removing the countertop, provided there is enough clearance to access mounting nuts and supply lines.

How do I prevent leaks after installing the new faucet?
Ensure all connections are tight but not over-tightened, use plumber’s tape on threaded fittings, and check for leaks by slowly turning the water back on and inspecting all joints.

How long does it typically take to change out a kitchen faucet?
For an average DIYer, the process usually takes between 1 to 2 hours, depending on the faucet type and complexity of the plumbing connections.

Do I need to hire a professional plumber to change my kitchen faucet?
Hiring a professional is recommended if you encounter complex plumbing, lack proper tools, or want to ensure the installation meets local codes and standards. However, many homeowners can successfully complete the task themselves with proper preparation.
Changing out a kitchen faucet is a manageable home improvement task that can significantly enhance both the functionality and aesthetics of your kitchen. The process involves careful preparation, including shutting off the water supply, disconnecting the old faucet, and properly installing the new one while ensuring all connections are secure and leak-free. Attention to detail during each step helps prevent common issues such as leaks or improper water flow.

Key takeaways for successfully changing a kitchen faucet include selecting the right faucet that fits your sink configuration, gathering all necessary tools beforehand, and following manufacturer instructions closely. It is also important to check for compatibility with existing plumbing and to test the new installation thoroughly before completing the project. Taking your time and working methodically will result in a professional-quality finish.

Overall, with the right preparation and careful execution, replacing a kitchen faucet can be completed efficiently by most homeowners without the need for professional assistance. This upgrade not only improves kitchen usability but can also add value to your home. By following best practices and safety precautions, you can ensure a smooth installation process and long-lasting performance from your new kitchen faucet.

Author Profile

Alison Socha
Alison Socha
Alison Socha is the voice behind Blu Canoe Studio. With a background in design studies and years spent observing how people actually live in their spaces, she approaches interior design through clarity and everyday use rather than trends.

Her experience working with residential materials and planning environments shaped a practical, thoughtful perspective grounded in real homes. Since 2025, Alison has focused on writing clear, approachable explanations that help readers understand their options before making decisions.

Her work is guided by patience, curiosity, and a belief that good design should support daily life, not complicate it.