How to Install a Single Hole Kitchen Faucet: A Step-by-Step Guide

Updated at: 16/05/2025

Upgrading your kitchen faucet can dramatically enhance both the functionality and aesthetic appeal of your sink area. A single-hole faucet, with its sleek and modern design, is a popular choice for many homeowners looking to refresh their kitchen. Installing one yourself can save you a significant amount of money compared to hiring a plumber, and the process is surprisingly straightforward for those with even basic DIY skills. This is especially true if you are replacing an existing single-hole faucet; the process is similar and often simpler than installing a faucet into a new sink.

This step-by-step guide will walk you through each stage of installing a single-hole kitchen faucet, from turning off the water supply to tightening the final connection. Whether you're a seasoned DIY enthusiast or a complete beginner, we'll provide clear instructions and helpful tips to ensure a smooth and successful installation, leaving you with a sparkling new faucet you can be proud of.

Preparation and Safety Guidelines

Tools Needed
  • Open-ended adjustable wrenches
  • Basin wrench (or crescent wrench)
  • Phillips head screwdriver
  • Bucket
  • Cleaning product
  • Brass adapters (if needed)
Safety Guidelines
  • Always turn off the water supply to the sink before beginning any work. Failure to do so could result in a significant water leak.
  • Wear safety glasses to protect your eyes from splashing water or debris.
  • If you are unsure about any step of the installation process, consult a qualified plumber.

Step-by-Step Instructions

  1. Preparation

    • Shut off the angle stops underneath the sink.
    • Open the faucet hot and cold side to relieve excess water.

  2. Remove Old Faucet

    • Remove the old faucet. This may vary depending on the model.
    • Disconnect the Flex connectors from the faucet using adjustable wrenches.
    • Remove the faucet from the sink using a basin wrench or crescent wrench.
    • Remove the old Flex connectors from the angle stops.
    Remove the old Flex connectors from the angle stops.Remove the old Flex connectors from the angle stops.
    Remove Old Faucet

  3. Clean and Prepare

    • Clean the sink hole.

  4. Prepare New Faucet

    • Prepare the new faucet by removing the nut, washer, and gasket.
    • Connect the Flex connectors to the faucet outside the sink (recommended).
    Connect the Flex connectors to the faucet outside the sink (recommended).
    Prepare New Faucet

  5. Install New Faucet

    • Install the faucet into the sink hole.
    • Secure the faucet with the nut, washer, and gasket. Tighten the screws on the nut evenly.
    Secure the faucet with the nut, washer, and gasket. Tighten the screws on the nut evenly.Secure the faucet with the nut, washer, and gasket. Tighten the screws on the nut evenly.
    Install New Faucet

  6. Connect Water Lines

    • Reconnect the plastic hose connector.
    • Attach the weight to the pullout hose.
    • Connect the hot and cold water lines to the angle stops using brass adapters if necessary.
    Connect the hot and cold water lines to the angle stops using brass adapters if necessary. Connect the hot and cold water lines to the angle stops using brass adapters if necessary. Connect the hot and cold water lines to the angle stops using brass adapters if necessary.
    Connect Water Lines

  7. Test and Finalize

    • Turn on the angle stops and check for leaks.
    • Flush the faucet with hot and cold water to clear debris.
    • Test the faucet.
    Test the faucet.Test the faucet.
    Test and Finalize

Read more: Fixing a Leaky Toilet Tank: A Step-by-Step Guide

Tips

  • If unsure where the shutoffs are, follow the Flex connector from the top of the faucet.
  • Use a basin wrench for easier removal of the faucet.
  • It's easier to install the Flex connectors to the faucet before installing the faucet itself.
  • Tighten the screws on the faucet nut evenly to prevent leaks.
  • Place the weight a couple of inches from the bottom of the hose to prevent banging against the cabinet.

Common Mistakes to Avoid

1. Over-tightening the mounting nut

Reason: Applying excessive force can crack the sink or damage the faucet's internal components.
Solution: Tighten the nut firmly but gently, using your hand or a wrench with a soft cloth to prevent scratching.

2. Ignoring the sealant/washers

Reason: Improper sealing leads to leaks and water damage.
Solution: Ensure all washers are correctly placed and that you use a suitable plumber's sealant around the base of the faucet.

FAQs

What tools do I need to install a single-hole kitchen faucet?
You'll typically need a basin wrench, adjustable pliers, channel-lock pliers, screwdrivers (Phillips and flathead), plumber's putty, and possibly a wrench for the water supply lines. Always check your faucet's installation instructions for specific tool requirements.
What if my new faucet doesn't match the existing holes in my sink?
This is a problem! Single-hole faucets require a single, appropriately sized hole in the sink. If the hole doesn't fit, you'll need to either find a faucet that matches your existing sink or have a new hole drilled by a professional. Attempting to force a mismatched faucet could damage your sink.