How To Replace A Bathroom Sink Cartridge

How to Replace a Bathroom Sink Cartridge

A leaky bathroom sink cartridge can be a frustrating issue, leading to wasted water and a potential for damage to your bathroom. Replacing the cartridge is a relatively simple task that you can complete yourself with a few basic tools. Here's a step-by-step guide to help you through the process:

Tools and Materials You'll Need

Before you start, gather the necessary tools and materials:

Replacement sink cartridge (make sure it's compatible with your faucet)
Adjustable wrench
Basin wrench
Phillips screwdriver
Flat-head screwdriver
Bucket or bowl
Plumber's putty (optional)

Step 1: Turn off the Water Supply

Locate the water shut-off valves beneath the sink. Turn both the hot and cold water valves clockwise to shut off the water supply.

Step 2: Open the Faucet

Turn on the faucet to drain any remaining water from the sink.

Step 3: Remove the Handle

Use a Phillips screwdriver to remove the handle screws. Lift the handle straight up and off the valve stem.

Step 4: Loosen the Retaining Nut

Position the basin wrench around the retaining nut located beneath the handle. Turn the retaining nut counterclockwise to loosen it.

Step 5: Remove the Cartridge

Gently pull the cartridge straight out of the faucet body.

Step 6: Inspect the Parts

Inspect the old cartridge for any damage or wear. Also, check the O-rings for any signs of deterioration.

Step 7: Apply Plumber's Putty (Optional)

If the cartridge doesn't have pre-installed O-rings, you may apply a thin bead of plumber's putty around the base of the new cartridge to create a watertight seal.

Step 8: Install the New Cartridge

Insert the new cartridge into the faucet body, ensuring that it is aligned correctly. Tighten the retaining nut clockwise using the basin wrench.

Step 9: Reinstall the Handle

Place the handle back onto the valve stem and secure it with the screws.

Step 10: Turn on the Water Supply

Slowly open the water shut-off valves and check for any leaks. If you notice any leaks, tighten the retaining nut further.

Step 11: Test the Faucet

Turn on the faucet and adjust the temperature and pressure as desired. Check for any leaks or unusual sounds.

Tips for Replacing a Bathroom Sink Cartridge

If you're not sure which replacement cartridge to use, consult your faucet manufacturer or a plumbing professional.
Use a basin wrench to avoid damaging the finish of your faucet.
If the retaining nut is particularly tight, you may need to use an adjustable wrench for added leverage.
Don't overtighten the retaining nut, as this can damage the cartridge or the faucet.
If you have any leaks after installing the new cartridge, try tightening the retaining nut further. If the leak persists, contact a plumber.

By following these steps, you can successfully replace a bathroom sink cartridge and restore your faucet to proper working condition.