How to Install a Sink in a Basement


Installing a bathroom sink yourself is simple and far less expensive than hiring a plumber to come to your home. Most bathroom sinks are drop-in units. The faucets are designed to attach to the sink. With a little knowledge and the correct tools, you will be able to complete this project with ease.

Things You'll Need

  • Clear silicone caulk
  • Caulking gun
  • Level
  • Wiping rag
  • Pliers
  • Hack Saw
  • PVC glue

Sink Installation

  • Test fit the sink by placing it in the hole in the countertop. If the sink does not fit properly, trim the countertop as needed with an appropriate saw.

  • Insert the silicone caulk into the caulking gun. Cut the tip of the silicone dispenser and puncture the seal inside the dispenser with a sharp object.

  • Apply a thin layer of silicone caulk around the exterior of the sink hole.

  • Place the sink into the hole in the countertop. Level the sink as needed with a level. Apply a line of silicone caulk completely around the sink base. Remove any excess caulk with a wiping rag.

Installing the Faucet

  • Insert the faucet into the holes in the sink. Place a fine bead of silicone around the faucet handles. Clean any excess silicone with a wiping rag.

  • Connect the supply lines to the faucet. The supply lines are those that go from the permanent home plumbing to the faucet. Tighten these lines using pliers.

  • Tighten the plastic faucet screws from inside the cabinet on the faucet with pliers. There are two threaded rods that are installed through the countertop. These hold the faucet in place.

  • Connect the supply lines to the main shutoff valves and tighten with a wrench.

Drain Installation

  • Attach the drain in the sink. Use plumber's putty on the drain to avoid any leaks. The drain nut is screwed from the bottom of the sink.

  • Measure the length of the drain pipe. Cut the pipe using a hack saw. Attach the flared end of the pipe to the sink drain assembly.

  • Attach the trap to the end of the pipe using a coupler. You must glue any peices that are not threaded.

  • Attach the trap to the permanent home plumbing line with a union connector using pvc glue.

  • Turn the water valve to the "on" position and check for any leaks in the installation.

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  • Photo Credit sink and faucet image by MAXFX from
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