Tools: Adjustable wrench, screwdriver set (Phillips and flathead), pipe cutter, PTFE tape (plumber’s tape), level (24-inch recommended), drill with drill bits, stud finder, pencil, measuring tape, and a bucket (for water runoff).
Materials: Your bathroom sink furniture (vanity, cabinet, or floating shelf), sink basin (if not pre-attached), faucet, drain assembly, mounting hardware (included with furniture or purchased separately), silicone caulk (mold-resistant), and a dry cloth.
Place a bucket under the sink to catch residual water.
Disconnect the P-trap (the curved pipe under the sink) using an adjustable wrench. Loosen the slip nuts gently to avoid damaging pipes.
Remove the faucet supply lines by unscrewing them from the shutoff valves.
For floor-standing vanities: Unscrew any bolts securing it to the wall, then lift it away. For wall-mounted units: Use a drill to remove mounting screws, and have a helper hold the fixture to prevent it from falling.
Clean the area thoroughly—wipe away dust, old caulk, or water stains to ensure a flat surface for the new furniture.
The installation process varies slightly between floor-standing and wall-mounted units, but the core steps (leveling, securing, and connecting plumbing) remain similar.
Floor-Standing Vanities: Place the vanity in the desired location. Use a level to check if it’s even—adjust with shims (small wooden or plastic wedges) under the base if it rocks. Shims ensure the vanity sits straight, preventing future damage to the sink or plumbing.
Wall-Mounted Cabinets/Shelves: Use a stud finder to locate wall studs (wooden beams behind drywall) — these provide the strength to hold the furniture. Mark the stud positions with a pencil. Hold the cabinet against the wall, align it with your marks, and use a level to confirm it’s horizontal. Mark the mounting hole locations on the wall through the cabinet’s pre-drilled holes.
Floor-Standing: Once level, drill pilot holes through the vanity’s base into the floor (if installing on wood) or use wall anchors (for tile/concrete floors). Screw the vanity into place—use screws long enough to penetrate the floor studs (at least 2 inches) for stability.
Wall-Mounted: Drill pilot holes into the marked stud locations (skip anchors if using studs, as they’re unnecessary). Hold the cabinet against the wall and drive screws through the cabinet’s mounting holes into the studs. Tighten until the cabinet is firm—avoid over-tightening, which can crack the wood or damage the drywall.
If your sink is top-mounted (drop-in): Apply a thin bead of silicone caulk around the sink’s edge. Lower it into the vanity’s countertop cutout, pressing gently to seal. Wipe away excess caulk with a damp cloth.
If your sink is undermounted: The sink will attach to the bottom of the countertop (follow the manufacturer’s instructions). Use clips to secure it, then apply caulk along the seam where the sink meets the countertop.
Install the faucet: Thread the faucet’s supply lines through the countertop/sink holes. Secure the faucet with mounting nuts from underneath, tightening with a wrench. Wrap PTFE tape around the faucet’s threaded connections to prevent leaks—wrap clockwise (3-4 turns) for a tight seal.
Insert the drain stopper into the sink’s drain hole. From underneath, attach the drain flange and washer, tightening with a wrench.
Connect the P-trap to the drain assembly and the wall drain pipe. Use PTFE tape on the threaded ends of the P-trap to prevent leaks. Ensure the P-trap has a slight curve (to hold water and block sewer gases) and is not kinked.
Turn the water supply back on slowly (clockwise for shutoff valves).
Turn on the faucet and let water run for 5-10 minutes—check underneath the sink for drips. Pay close attention to supply line connections and the P-trap.
If you spot a leak: Turn off the water, tighten the connection slightly, and re-test. If leaks persist, check for damaged washers or threads—replace parts if needed.
Clean the sink and vanity regularly with a non-abrasive cleaner to prevent soap scum and mold.
Check plumbing connections every 3-6 months—tighten loose nuts to avoid leaks.
For wooden vanities, wipe up water spills immediately to prevent warping or discoloration.
Vanity is uneven: Add or adjust shims under the base (floor-standing) or re-align the cabinet (wall-mounted) using a level.
Leaky faucet: Replace worn washers or O-rings, or reapply PTFE tape to the supply line connections.
Sink won’t drain: Clear clogs from the P-trap using a plunger or pipe snake—avoid using harsh chemicals that can damage pipes.
