How to Install a Pedestal Sink

Pedestal sinks offer a clean, timeless aesthetic that opens up smaller bathrooms by removing the visual bulk of a vanity cabinet. The transition from a clunky cabinet to a graceful pedestal creates more floor space and draws the eye upward, but it requires a precise approach to wall anchoring and plumbing alignment to remain sturdy for years to come. Done well, your sink will feel rock-solid, showing no wobble when you lean on it. The secret lies in the wall support; because pedestal sinks do not rely on a cabinet frame, the wall mount must be perfectly level and anchored into structural blocking behind the drywall. If you are replacing an existing vanity, expect to do a bit of wall patching before you get to the installation stage.

  1. Drain and Disconnect Everything. Shut off the water supply valves under the sink and disconnect the P-trap and supply lines. Unscrew the vanity cabinet from the wall and lift it out, leaving the supply and drain pipes exposed.
  2. Build Your Anchor Point. If your wall lacks solid wood blocking behind the sink mounting holes, you must cut a section of drywall and install a 2x6 piece of lumber between studs. Screw the blocking into the studs and patch the drywall so the surface is flush and ready for the sink mount.
  3. Secure the Bracket Plumb. Hold the manufacturer-provided mounting bracket against the wall at the recommended height and ensure it is perfectly level. Mark the screw locations and drive the provided heavy-duty lag bolts directly into your new wood blocking.
  4. Assemble Before Hanging. Before hanging the basin, install the faucet assembly and the drain pop-up onto the sink. Tighten the mounting nuts from underneath, ensuring the rubber gaskets are seated correctly to prevent future leaks.
  5. Lift and Lock in Place. Lift the sink basin and slide it onto the wall bracket. Once it is secure, place the pedestal base underneath and align it with the basin's underside indentation to ensure a vertical, stable fit.
  6. Seal All Water Connections. Connect the supply lines to the shut-off valves and assemble the P-trap to the drain tailpiece. Hand-tighten the plastic slip nuts, then give them an extra quarter turn with pliers to ensure they are snug.