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How to mount a floating sink?

Published in Bathroom Fixtures 5 mins read

To mount a floating sink, you primarily need to secure its dedicated mounting brackets or support frame directly into wall studs or using appropriate heavy-duty anchors, followed by plumbing connections. The process involves precise measurements, structural integrity, and careful assembly of waste components.

A floating sink, also known as a wall-mounted sink, offers a minimalist aesthetic and frees up floor space, making it a popular choice for modern bathrooms and powder rooms. Its installation requires a robust connection to the wall, as it relies entirely on the mounting hardware for support.

Essential Tools & Materials

Before you begin, gather the necessary tools and materials to ensure a smooth installation process.

  • Floating Sink Kit: Includes the sink basin, mounting brackets, and hardware.
  • Drill: With appropriate bits for pilot holes and anchor installation.
  • Stud Finder: Crucial for locating wall studs.
  • Level: For ensuring a perfectly straight installation.
  • Measuring Tape: For accurate placement.
  • Pencil: For marking positions.
  • Wrench/Spanner Set: For tightening nuts and bolts.
  • Plumber's Putty or Silicone Sealant: For sealing connections and edges.
  • Adjustable Pliers: For various plumbing tasks.
  • Safety Glasses: For eye protection.
  • Teflon Tape: For sealing threaded plumbing connections.
  • Bucket and Towels: For managing any water spills during plumbing.

Step-by-Step Floating Sink Mounting Process

Mounting a floating sink is a multi-step process that combines carpentry for wall attachment and plumbing for water supply and drainage.

1. Plan and Prepare Your Installation Area

  • Determine Sink Height: A standard rim height for bathroom sinks is typically 32-34 inches from the finished floor, but this can be adjusted for personal comfort or accessibility needs.
  • Locate Wall Studs: Use a stud finder to locate and mark the center of the wall studs where the sink will be mounted. Floating sinks require secure attachment to studs for proper support. If studs don't align with your desired sink position, you may need to add blocking between studs or use heavy-duty toggle or sleeve anchors rated for the sink's weight.
  • Mark Mounting Points: Hold the sink or its mounting template against the wall at the desired height. Use a level to ensure it's straight, then mark the exact locations for drilling pilot holes for the mounting brackets.

2. Install Mounting Brackets/Supports

This is the critical step for structural support.

  • Secure Brackets: Align the sink's mounting brackets with your marked points. As seen in the installation process, you need to place your brackets in position and tighten the fixings securely into the wall studs or appropriate heavy-duty anchors. Ensure these are perfectly level and extremely stable, as they will bear the entire weight of the sink and its contents. Use robust lag screws or bolts designed for wall mounting.

3. Mount the Sink Basin

  • Attach Sink: Carefully lift the sink basin and position it onto the installed mounting brackets. Some sinks slide onto pins, others bolt directly to the brackets. Secure the sink to the brackets according to the manufacturer's instructions, ensuring all connections are tight and the sink is stable. Double-check with a level.

4. Assemble and Connect Plumbing

Once the sink is securely mounted, you can proceed with connecting the necessary plumbing components.

  • Install Faucet: Before connecting the drain, install the faucet onto the sink according to the manufacturer's instructions.
  • Assemble Waste Outlet: Then you can start to assemble the waste outlet for the plug. This involves installing the drain assembly (pop-up stopper or grid drain) into the sink's drain opening. Apply plumber's putty or silicone sealant around the flange of the drain assembly before inserting it into the sink to create a watertight seal. Tighten the locking nut from underneath the sink.
  • Fit the Bottle Trap: Once this is in position and tightened up you can fit the bottle trap. The bottle trap (or P-trap) is essential for preventing sewer gases from entering your home. Connect the tailpiece from the sink's drain assembly to the inlet of the bottle trap, and then connect the outlet of the bottle trap to the drainpipe stubbing out from the wall. Ensure all connections are hand-tightened, then use adjustable pliers to give them a final snug turn without overtightening. Use Teflon tape on any threaded connections for a better seal.
  • Connect Water Supply: Attach the hot and cold water supply lines from the wall shut-off valves to the corresponding inlets on the faucet. Use Teflon tape on the threaded connections to prevent leaks.
Plumbing Component Function Installation Tip
Waste Outlet Drains water from basin Use plumber's putty for watertight seal
Bottle Trap Blocks sewer gases Ensure proper alignment with drainpipe
Water Supply Delivers hot/cold water Use Teflon tape on threads

5. Final Checks and Sealing

  • Test for Leaks: Turn on the water supply and thoroughly inspect all plumbing connections for any leaks. Let the water run for a few minutes and fill the sink to check the drain.
  • Seal Edges: Apply a bead of silicone sealant along the back and side edges where the sink meets the wall to prevent water from seeping behind the sink and causing damage. Smooth the caulk line with a wet finger or a caulking tool.

By following these steps, you can successfully mount a floating sink, enhancing the aesthetic and functionality of your space. Always refer to your specific sink's installation manual for detailed instructions and any unique requirements.