Clearing a blocked sink drain requires only few basic tools and a little elbow grease.
Step 4: For bathroom sink, remove drain plug and clear trap In a bathroom sink, a lever raises and lowers the drain plug. The lever is attached to the knob on the sink. Unscrew the nut on the back of the drain pipe and pull the control rod out. Remove the drain plug from the sink bowl and push a plumber's snake down the drain to clear remaining blockage. Unscrew the knob and pull the control rod to release the drain plug.
