How to Replace a Kitchen Faucet: A Step-by-Step Guide

A kitchen faucet is one of the most frequently used fixtures in a home, and over time, it may start leaking, corroding, or simply become outdated.

Replacing a kitchen faucet is a manageable DIY project that requires minimal plumbing skills, as long as you have the right tools and a step-by-step approach.

Our kitchen remodeling experts put together this guide to walk you through the process of replacing your kitchen faucet, ensuring a smooth and efficient installation.

Tools and Materials Needed

Before beginning, gather the following tools and materials to make the job easier:

  • Adjustable wrench
  • Basin wrench
  • Plumber’s tape (Teflon tape)
  • Bucket or towel (to catch water)
  • Plumber’s putty or silicone caulk
  • Screwdriver (Phillips and flathead)
  • Pipe wrench (if necessary)
  • New kitchen faucet with installation instructions
  • Supply lines (if not included with the new faucet)
  • Towels or rags

Step 1: Turn Off the Water Supply

The first step in replacing your kitchen faucet is shutting off the water supply. Most sinks have shutoff valves located under the sink. There should be two separate valves—one for hot water and one for cold.

  • Turn the valves clockwise to close them.
  • If there are no shutoff valves, you will need to turn off the main water supply to your home.
  • Once the water is off, open the faucet to drain any remaining water from the lines.

Step 2: Disconnect the Water Supply Lines

With the water turned off, you can now disconnect the supply lines.

  • Place a bucket or towel under the sink to catch any remaining water.
  • Use an adjustable wrench to loosen the nuts connecting the water supply lines to the faucet.
  • If the supply lines are old, consider replacing them with new ones to ensure a secure and leak-free installation.

Step 3: Remove the Old Faucet

Removing the existing faucet can be challenging due to rust or mineral buildup, especially if it has been installed for a long time.

  • Locate the mounting nuts that secure the faucet to the sink. These are typically found underneath the sink.
  • Use a basin wrench or an adjustable wrench to loosen and remove the nuts.
  • If the faucet has a sprayer hose, disconnect it.
  • Once all fasteners are removed, carefully lift the old faucet out of the sink.

Step 4: Clean the Sink Surface

After removing the old faucet, clean the area around the sink holes.

  • Scrape off any old plumber’s putty, caulk, or grime with a putty knife or sponge.
  • Wipe the area with a damp cloth to ensure a smooth surface for the new faucet.

Step 5: Install the New Faucet

Before installation, check the manufacturer’s instructions for specific guidelines.

  • Single-Hole Installation: If your sink has one hole, insert the faucet through it and secure it underneath with the mounting hardware.
  • Three-Hole Installation: If your sink has multiple holes, you may need a deck plate (escutcheon) to cover unused holes. Some faucets come with one included.
  • Sprayer Hose Connection: If your new faucet includes a pull-down sprayer, feed the sprayer hose through the designated hole.

Step 6: Secure the Faucet

Once the faucet is positioned correctly:

  • Tighten the mounting nuts underneath the sink using a basin wrench.
  • If using a deck plate, ensure it is evenly aligned before securing the faucet in place.
  • Apply plumber’s putty or silicone sealant around the base of the faucet if the manufacturer recommends it.

Step 7: Connect the Water Supply Lines

Now that the faucet is secure, reconnect the water supply lines.

  • Attach the hot and cold water supply lines to the corresponding valves.
  • Wrap plumber’s tape around the threads to prevent leaks.
  • Tighten the connections with an adjustable wrench, but avoid overtightening to prevent damage.

Step 8: Connect the Sprayer Hose (If Applicable)

If your faucet includes a pull-down or side sprayer:

  • Attach the sprayer hose to the faucet connection.
  • Secure it with the provided clip or fastener.
  • Ensure the hose moves freely without kinking or obstruction.

Step 9: Turn the Water Back On

With everything connected:

  • Slowly turn on the shutoff valves.
  • Check for any leaks around the connections.
  • If leaks are present, tighten the fittings slightly or apply more plumber’s tape.

Step 10: Test the Faucet

Once the water is running:

  • Turn the faucet on and check both hot and cold settings.
  • Test the sprayer hose (if installed).
  • Inspect the base of the faucet and connections for leaks.

Step 11: Final Adjustments and Clean-Up

After confirming the faucet is functioning properly:

  • Wipe down the area to remove any excess plumber’s putty or sealant.
  • Organize the under-sink area and ensure all tools are stored away.

Conclusion

Replacing a kitchen faucet is a straightforward DIY task that can save you time and money compared to hiring a plumber.

By following these step-by-step instructions, you can successfully install a new faucet, improving both the functionality and aesthetic appeal of your kitchen.

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