How to Replace a Bathroom Faucet: A Step-by-Step Guide

• • New bathroom faucet (matching your sink’s hole configuration)
  • Adjustable wrench or basin wrench
  • Plumber’s tape (Teflon tape)
  • Silicone sealant or bathroom caulk
  • Gaskets or rubber/plastic seals (usually included with the faucet)
  • Bucket or small container
  • Cleaning rag and all-purpose cleaner
  • Optional: new sink drain kit if replacing the drain

• • Turn off the water supply under the sink by closing the hot and cold shut-off valves.

  • Relieve pressure by turning on the faucet and letting any remaining water drain out.

  • Clear the space under the sink for easy access, and place a bucket underneath to catch drips.

• • Disconnect the hot and cold water supply lines from the faucet.

  • Loosen and remove the mounting nuts underneath the sink. A basin wrench helps in tight spaces.

  • Detach the lift rod from the drain assembly if your faucet has one.

  • Lift the old faucet out from above the sink.

  • Clean the sink surface and remove any old sealant or residue.

If your new faucet comes with a drain assembly:

• • Remove the P-trap and disconnect the old drain.
  • Install the new drain tailpiece and flange, using plumber’s putty or sealant where needed.
  • Reattach the P-trap securely.

• • Place the new faucet in the sink holes, using the gasket or seal provided.

  • From below, secure the faucet with mounting nuts. Hand-tighten first, then finish with a wrench—avoid over-tightening.

  • Connect the lift rod to the drain assembly if applicable.

  • Reconnect the hot and cold supply lines to the new faucet.

  • Apply a bead of silicone or caulk around the faucet base if required.

• • Turn the water supply back on.

  • Run both hot and cold water for a few minutes.

  • Check all connections above and below the sink. Tighten gently if you see drips.

  • Make sure the drain works properly and seals when closed.

• • Match your faucet style to the sink’s hole setup before purchasing.

  • Use plumber’s tape on threaded connections for a watertight seal.

  • Don’t overtighten fittings, which can damage parts or crack porcelain.

  • Keep a towel or rag handy—some water is always left in the lines.