How To Replace A Bathroom Sink Cartridge

By | May 6, 2023

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.

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