How To Change Single Handle Bathroom Faucet

How to Change a Single Handle Bathroom Faucet

Replacing a single handle bathroom faucet is a relatively simple plumbing repair that can be completed in under an hour with the right tools and materials. Here's a comprehensive guide to walk you through the process step by step:

Tools and Materials Required:

Adjustable wrench
Basin wrench (optional)
Pliers
New single handle bathroom faucet
Plumber's putty or silicone caulk
Work gloves

Step 1: Turn Off Water Supply and Drain Faucet

Begin by turning off the water supply valves located under the sink. If there aren't any, you'll need to shut off the main water supply. Once the water is off, open the faucet to drain any remaining water from the lines.

Step 2: Disconnect Supply Lines

Use an adjustable wrench to loosen the nuts that connect the supply lines to the faucet. If you have a basin wrench, it will provide a better grip and make it easier to remove the nuts. Simply loosen the nuts by turning them counterclockwise.

Step 3: Remove Cartridge

Locate the screw that holds the cartridge in place and remove it using a screwdriver. The cartridge is a cylindrical component that controls the flow of water. Once the screw is removed, gently pull the cartridge straight up to remove it.

Step 4: Clean and Apply Plumber's Putty

Clean the seating surface where the new cartridge will be installed using a damp cloth. Apply a ring of plumber's putty or silicone caulk around the base of the new cartridge. This will create a watertight seal.

Step 5: Insert New Cartridge

Align the new cartridge with the seating surface and carefully push it down until it is fully seated. Make sure the handle is in the "off" position before inserting the cartridge.

Step 6: Reinstall Handle and Screw

Once the cartridge is in place, reinstall the handle and tighten the screw that holds it in place. Do not overtighten the screw, as you could damage the handle or cartridge.

Step 7: Reconnect Supply Lines

Hand-tighten the nuts that connect the supply lines to the faucet. Then, use the adjustable wrench to tighten them further, but be careful not to overtighten. Remember, hand-tightening is sufficient and excessive force can damage the connections.

Step 8: Turn on Water Supply and Check for Leaks

Turn on the water supply valves and check for any leaks. Make sure the handle operates smoothly and controls the water flow properly. If there are any leaks, tighten the connections further or reapply plumber's putty.

Step 9: Seal Base of Faucet

To prevent water from seeping around the base of the faucet, apply a thin bead of silicone caulk around the rim where the faucet meets the sink or countertop. Smooth the caulk with your finger or a wet cloth.