How to Repair a Single-Handle Bathroom Faucet?

Repairing a single-handle bathroom faucet can be a DIY project if you have some basic plumbing skills and the right tools. Here's a general guide on how to repair a single-handle bathroom faucet:
Single-Handle Bathroom Faucet

Note: Before you begin, turn off the water supply to the faucet. You can usually do this by shutting off the water valves located under the sink.

Tools and materials you may need:

  • Adjustable wrench
  • Screwdriver (Phillips and flat-head)
  • Plumber's tape
  • Replacement parts (cartridge, O-rings, or other components as needed)


  1. Inspect and diagnose the problem: Determine what is causing the issue with your faucet. Common problems include dripping, leaking, low water pressure, or difficulty in turning the handle. The specific issue will guide your repair process.
  2. Gather replacement parts: Once you've identified the problem, purchase the necessary replacement parts. This may include a new cartridge, O-rings, or other components specific to your faucet model.
  3. Turn off the water: Locate the shut-off valves under the sink and turn off both the hot and cold water supplies.
  4. Remove the faucet handle:
    a. Remove the decorative cap or cover on the faucet handle if applicable.
    b. Use a screwdriver to remove the screw that holds the handle in place.
    c. Carefully lift off the handle, exposing the faucet cartridge.
  5. Replace the cartridge:
    a. Depending on your faucet model, you may need to use an adjustable wrench to remove a retaining nut.
    b. Remove the old cartridge and replace it with the new one.
    c. Ensure that the new cartridge is properly aligned and seated.
  6. Inspect and replace O-rings: If your faucet is still leaking or dripping after replacing the cartridge, inspect the O-rings and seals for damage. Replace any damaged O-rings or seals with new ones.
  7. Reassemble the faucet:
    a. Put the faucet handle back in place, ensuring it aligns properly with the cartridge.
    b. Reattach the screw and decorative cap or cover (if applicable).
  8. Turn on the water: Slowly turn on the shut-off valves to restore water flow to the faucet. Check for leaks or drips. If you find any, tighten connections or replace any faulty components.
  9. Test the faucet: Turn on the faucet and check for proper operation. Make sure the water flows smoothly and there are no leaks or drips.
  10. Adjust temperature and pressure: If necessary, adjust the temperature and pressure using the handle or any adjustment features your faucet may have.
  11. Clean up: Dispose of any old parts and tools properly, and clean up any water or debris from the repair process.

If you encounter any difficulties during the repair process or are unsure about any step, it's a good idea to consult the manufacturer's instructions for your specific faucet model or seek assistance from a professional plumber.

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