How To Replace A Bathroom Sink Drain Pipe

Replacing a bathroom sink drain pipe is a relatively simple plumbing task that can be completed in a few hours.

Tools and materials you will need:

Instructions:

Turn off the water supply to the sink. This is usually done by turning the shut-off valves under the sink.
Place a bucket or bowl under the drain to catch any water that may leak out.
Use an adjustable wrench to loosen the nuts that hold the drain pipe in place. Be careful not to overtighten the nuts, as this can damage the pipe.
Pull the old drain pipe out of the sink. You may need to use pliers to help you get it out.
Apply a bead of plumber's putty to the rim of the new drain pipe. This will help to create a watertight seal.
Insert the new drain pipe into the sink. Tighten the nuts by hand, then use the adjustable wrench to tighten them further.
Turn on the water supply and check for leaks. If you see any leaks, tighten the nuts further.

Tips:

If you are not comfortable replacing the drain pipe yourself, you can call a plumber for assistance.
Be sure to use a new drain pipe that is the same size as the old one.
Apply a generous amount of plumber's putty to the rim of the new drain pipe. This will help to prevent leaks.
Tighten the nuts on the drain pipe until they are snug, but do not overtighten them.