How to Upgrade a Bathroom Vanity
Ask This Old House plumbing and heating expert Richard Trethewey installs a vanity for homeowners who gave up on it seven years ago.
- Shut the hot and cold water lines off.
- Disconnect the sink from the P-trap and break the hose connections to the faucet.
- Use the utility knife to break the seal between the sink and the countertop. Then, carefully pry the sink away from the countertop with a hammer and a pry bar.
- Remove the screws holding the vanity to the wall and remove the vanity.
- Shut the water off to the house and cut the hot and cold water lines. Cut the P-trap as well. This will make it so only small holes need to be cut in the back of the new vanity.
- Measure the distance from the wall to the hot line and cold line. Next, measure the distance from the floor to the hot and cold lines. Transfer these measurements to the back of the vanity and cut out holes with the hole saw.
- Move the new vanity into place. Check it for level and screw it into the wall.
- Connect new shutoff valves to the hot and cold lines.
- Flip the countertop upside down and mount the sink to the countertop with silicone caulking and sink clips.
- Connect the faucet to the countertop using the plumber’s putty and the mounting brackets.
- Connect the hot and cold water lines to the faucet, then connect the drain pipe and the pop-up drain.
- Once all the connections are made, flip the counter right side up and place it on the cabinet.
- Make a new P-trap connection with the drain and connect the hot and cold water lines to the shutoff valves.
- Turn the water back on.
All the tools Richard used for the project, including wrenches, plumber’s putty, and PVC glue, can be found at home centers and plumbing supply stores.
The vanity and countertop were custom-ordered by the homeowner.