How to Switch from a Two-Handle to a Single-Handle

Switching from a two-handle faucet to a single-handle faucet can modernize your sink area and make everyday use more convenient. Single-handle faucets offer easier temperature and flow control, a sleeker design, and often require less space. If you’re considering making the switch, this guide will walk you through the process, from preparation to installation, ensuring a smooth and successful transition.

Things to Consider Before Replacing Your Faucet

Before jumping into the installation process, there are a few important considerations:

1. Sink Compatibility – Most two-handle faucets require three holes for installation, while single-handle faucets often need only one. If your sink has extra holes, you may need to use a deck plate (escutcheon) to cover them.
2. Water Supply Lines – Ensure your new single-handle faucet is compatible with your existing water supply connections. You might need adapters if the sizes don’t match.
3. Tools and Materials – Gather the necessary tools before starting:
   • Adjustable wrench
   • Basin wrench
   • Plumber’s tape
   • Bucket (to catch any residual water)
   • Towels
   • Plumber’s putty or silicone caulk (if required by the faucet)

Step 1: Remove the Old Two-Handle Faucet

1. Turn Off the Water Supply

Before removing the existing faucet, turn off the water supply using the shut-off valves under the sink. If your sink doesn’t have shut-off valves, you’ll need to turn off the main water supply to your home. Open the faucet handles to release any remaining water and pressure in the lines.

2. Disconnect the Supply Lines

Using an adjustable wrench, loosen and disconnect the hot and cold water supply lines from the faucet. Place a bucket or towels underneath to catch any water drips.

3. Remove the Mounting Hardware

Most two-handle faucets are secured with nuts under the sink. Use a basin wrench or an adjustable wrench to loosen and remove these nuts. If the nuts are rusted or stuck, applying penetrating oil can help loosen them.

4. Lift Out the Old Faucet

Once the mounting hardware is removed, lift the old faucet out of the sink. Clean the sink surface thoroughly to remove any residue or old plumber’s putty.

Step 2: Prepare for the New Single-Handle Faucet

1. Check for Extra Holes

If your sink has extra holes, determine whether your new faucet comes with a deck plate to cover them. If not, you can use sink hole covers to close the gaps.

2. Position the New Faucet

Place the single-handle faucet into the mounting hole. If your faucet requires a gasket or putty under the base, apply it according to the manufacturer’s instructions to prevent leaks.

Step 3: Install the New Single-Handle Faucet

1. Secure the Faucet

Under the sink, attach the mounting hardware to secure the new faucet in place. Tighten the nuts evenly, ensuring the faucet remains aligned properly on the sink.

2. Connect the Water Supply Lines

Attach the hot and cold water supply lines to the corresponding inlets on the new faucet. If your faucet has integrated supply lines, you may need adapters to connect them to your shut-off valves. Use plumber’s tape on threaded connections to ensure a watertight seal.

3. Check for Leaks

Turn on the water supply and check for leaks. Slowly open the faucet handle to allow water to flow through. If you notice any leaks at the connections, tighten them as needed.

Step 4: Final Touches

1. Seal Any Gaps

If your faucet requires a sealant around the base, apply plumber’s putty or silicone caulk and wipe away any excess.

2. Test the Faucet

Run both hot and cold water to test the faucet’s functionality. Ensure smooth operation of the handle and check for any leaks under the sink.

Benefits of a Single-Handle Faucet

Making the switch to a single-handle faucet offers several advantages:

• Ease of Use – You can control water temperature and flow with one hand, making it more convenient for busy kitchens and bathrooms.
• Space-Saving Design – A single-handle faucet takes up less space, making it ideal for smaller sinks and countertops.
• Modern Aesthetic – Single-handle faucets provide a sleek, minimalist look that enhances the style of any sink area.
• Easier Maintenance – With fewer components than a two-handle faucet, a single-handle faucet is easier to clean and maintain.

Conclusion

Upgrading from a two-handle faucet to a single-handle faucet is a straightforward process that can significantly improve the functionality and appearance of your sink. By following these steps, you can confidently install your new faucet and enjoy the benefits of modern design and convenience. Whether for a kitchen or bathroom, this simple upgrade can make a big difference in your daily routine.