How to Install a Pedestal Sink

Pedestal sinks are the ultimate space-savers for compact bathrooms, trading bulky vanity cabinets for an open, airy footprint. Because they lack the structural support of a cabinet, their installation relies entirely on precise wall anchoring and accurate plumbing alignments. Done well, the basin feels as solid as a rock; done poorly, you will be staring at a wobbly, leaking fixture that eventually damages your drywall. The secret to a professional installation is ensuring your wall blocking is secure before you even lift the basin. Unlike a heavy vanity, a pedestal sink's weight is shared between the floor and the wall, meaning you have to get the height exactly right so the basin doesn't put stress on your supply lines or drain piping. Take your time with the measurements, check your levels twice, and don't rush the silicone seal at the wall.

  1. Mark the height precisely. Hold the sink basin at the desired height, typically 32 to 34 inches from the floor. Use a pencil to mark the mounting holes on the wall and the footprint of the pedestal base on the floor.
  2. Anchor into the studs. Open the drywall if there are no studs where the mounting bracket needs to go. Install 2x6 lumber between the existing studs, flush with the front of the wall, and patch the drywall.
  3. Level the bracket first. Secure the basin mounting bracket directly into the wall blocking using heavy-duty lag screws. Ensure the bracket is perfectly level before tightening the screws completely.
  4. Seal the faucet first. Install the faucet and drain assembly onto the basin while it is still on the ground. Tighten all nuts underneath the basin firmly to ensure no leaks occur once the sink is on the wall.
  5. Lift with a partner always. Lift the basin and slide it onto the wall bracket. Check that it sits flush against the wall and level across the top.
  6. Tighten gently or crack. Slide the pedestal base underneath the basin. Secure the base to the floor and the basin using the manufacturer-provided hardware, but do not overtighten the porcelain, or it will crack.
  7. Test for leaks immediately. Attach the P-trap to the drain tailpiece and connect the supply lines to the shut-off valves. Run water through the system and check for leaks at every joint.