How to Install a Porcelain Bathroom Sink


Bathroom sinks are commonly constructed of white or a light-colored porcelain. After regular usage, the porcelain will begin to stain and will even chip or break if a heavy object is dropped on it. A chipped or broken porcelain sink must be replaced to prevent further damage to the sink, and prevent water damage to the bathroom from water escaping the bowl. When installing a new sink, it is important to take extra time to ensure that the sink connections and drain are watertight.

Things You'll Need

  • Plumber's putty
  • Pipe wrench
  • Putty knife
  • Plumber's tape
  • Adjustable wrench
  • Water-based caulk
  • Caulk gun
  • Damp rag
  • Place the faucet into the sink and then secure the faucet to the sink using the bolts that connect to the bottom of the handles.

  • Apply a ring of plumber's putty to the bottom of the drain collar.

  • Insert the drain assembly through the bottom of the sink and then screw the drain collar onto the drain assembly from the top of the sink. Use a pipe wrench to tighten the drain assembly from the bottom of the sink.

  • Scrape the plumbers putty off of the drain on the inside of the sink. Use a putty knife or your fingers to remove.

  • Apply plumbers tape to the water connections below the handles. Wrap the plumber's tape clockwise around the bottom of the threaded connection, no more than one time.

  • Connect the water valve risers to the threaded pipes that were wrapped with plumber's tape. Use an adjustable wrench to tighten.

  • Connect the drain stopper clip to the metal drain stopper bracket on the bottom of the drain assembly.

  • Run a bead of caulk around the perimeter of the underside of the sink bowl.

  • Place the porcelain bowl into place and align the drain assembly with the P-trap, which is the curved pipe below.

  • Tighten the drain assembly to the P-trap using the connector. First tighten by hand and then use a pipe wrench to tighten further, but do not over-tighten.

  • Wrap the threaded valves on the shutoff valves below the sink clockwise with plumbers tape.

  • Connect the water valve risers to the shutoff valves and then tighten using the adjustable wrench. Be sure the connect the hot valve to the hot faucet handle, and the cold valve to the cold handle.

  • Test the drain stopper and adjust the clip below as needed.

  • Run a bead of caulk around the rim of the bowl to form a watertight seal and then use a damp cloth to remove the excess caulk.

  • Turn the water supply valves on and check for any leaks. If any leaks are found, tighten using an adjustable wrench or pipe wrench.

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  • Photo Credit David De Lossy/Digital Vision/Getty Images
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