When your bathroom sink starts to age, it can become stained, discolored or scratched, which can make your whole bathroom look a little less appealing. Even replacing just the sink once it has reached this point can give your bathroom a whole new look and feel. Replacing the sink in a bathroom vanity top is a relatively simple process that you can complete in less than an hour.
Turn the water off. Simply turn the shut-off valves under the sink in a clockwise direction to turn off the water to the sink.
Remove the P-trap, the "U"-shaped pipe that connects the sink and the wall. You may be able to loosen the screw by hand, or you may need to use plyers or a wrench. Place a bucket under the area to catch any water that falls out of the trap.
Cut the strip of caulk that holds the sink in place on the vanity with a utility knife.
Remove the sink by pulling it straight up and out of the vanity top.