How to Install a Bathroom Faucet

Upgrade your faucet without the help of a professional

It's common to add new bathroom plumbing fixtures as part of your DIY renovation project, and installing a new faucet and drain assembly is a fairly easy task that just about anyone can handle. If you're adding a new faucet to your bathroom sink or bathtub, it's recommended that you also replace your bathroom drains. Your new drain should include both a replacement P-trap as well as a new tailpiece to ensure water clears from your tub or sink basin efficiently.

Steps to Installing a New Bathroom Faucet

You can install a bathroom faucet in six fairly easy steps:

  1. Begin by uninstalling your existing fixtures. Turn off the water supply to your bathroom, and use a basin wrench to lift off the compression nut which rests at the base of the faucet, once you've loosened up the supply tubes which service your hot and cold water taps. Then, lift off the faucet assembly.
  2. Pop off the nut holding your P-trap in place, and remove the nut fusing the drain assembly to the sink basin. Next, remove the drain and its flange by unscrewing it and lifting it out.
  3. Use industrial tape or Teflon paste as adhesive on the faucet stems. Add caulking below the faucet so you can secure the new faucet stems. Next, install and tighten up the nuts before connecting your new supply tubes to the hot and cold water taps. Be careful not to over-tighten them, though, or you'll have a hard time turning the faucet on.
  4. Next, attach your new drain housing to its flange by applying caulking to the flange underside, then installing the lock nut, metal washer and replacement gasket. Secure the drain housing by screwing it to the flange.
  5. Slide the new pop-up drain down the drain opening, and attach all the connecting links by screwing them into place. Test to make sure it works by pulling up on the lever; the drain should go down when you pull up.
  6. Finalize the installation by connecting the replacement extension to your new P-trap. Turn the water supply back on, and test the system to make sure everything is working.

During your test, make sure no water is leaking from the fixture. If you detect leaks, you can correct them by tightening up the connecting nuts and screws.