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How to Replace a Bathroom Faucet

Need to update your bathroom sink faucet? Watch this DIY Smarts as Ask This Old House plumbing and heating expert Richard Trethewey demonstrates how to replace a bathroom faucet.

In this video, Richard Trethewey demonstrates how to replace a bathroom faucet.

Steps for Replacing a Bathroom Faucet:

  1. Shut off water by hand or with a specialty wrench. Be careful not to over torque.
  2. Use a pan or rag to catch any dripping water under the sink. Turn on the faucet to relieve any water pressure left in the lines.
  3. Disconnect the supply lines from the faucet. Use a multi-purpose plumbing tool if you cannot reach it by hand.
  4. Remove the old faucet.
  5. Place Plumber’s Putty around the bottom of the faucet to make a watertight connection. It should fill in any imperfection of the sink.
  6. Place the faucet through the mounting holes in the sink and tighten the nuts.
  7. Remove the excess putty.
  8. Install the lift rod.


Richard installed a Glacier Bay 4 in Centerset 2-Handle Low-Arc Bathroom Faucet, which can be found at The Home Depot. The plumber’s putty and wrench sets Richard used can be found at any home center.

The specialty faucet wrench Richard used to break the connections underneath the sink is an EZ Change Faucet Tool, which is manufactured by Rigid.