How to Install a Wall-Mounted Bathroom Faucet

Faucets mounted to the wall offer a clean, minimalist aesthetic that clears up counter space and makes cleaning the basin significantly easier. This project requires shifting your plumbing behind the drywall, which means your primary concern is ensuring the valve is perfectly level and set to the correct depth before you close up the wall. Done well, a wall-mounted installation looks architectural and intentional. Done poorly, you risk hidden leaks behind the wall or a faucet that sits at an awkward angle. Take your time during the rough-in phase, as this is the point of no return for your plumbing layout.

1. Lock In the Perfect Height. Determine the ideal height for your faucet based on the sink basin depth to avoid splashing. Secure the valve body to a piece of pressure-treated lumber braced between your wall studs.
2. Route Water to the Valve. Run your hot and cold PEX or copper lines from your main supply to the valve inlet ports. Use a spirit level to ensure the valve body is perfectly horizontal before securing the piping.
3. Catch Hidden Leaks Early. Before closing the wall, turn on the main water supply to check for leaks at every joint. Leave the system pressurized for at least two hours to ensure no slow drips are present.
4. Seal Around the Valve. Install your backer board and tile around the valve sleeve, ensuring the hole is cut tight to the valve trim shroud. Seal the perimeter of the valve sleeve with 100% silicone caulk.
5. Install the Visible Hardware. Screw the spout and handle cartridges into the valve body using the provided mounting hardware. Apply plumber's tape to any threaded male connections to prevent internal leaks.
6. Purge the System. Remove the aerator from the spout and turn on the water to flush out any debris that may have entered the lines during construction. Reattach the aerator once the water runs clear.