How to Clear a Slow-Draining Bathroom Sink

Pipes in the bathroom eventually succumb to a stubborn combination of hair, toothpaste, and soap scum that builds up right at the stopper. When you notice the basin holding water longer than usual, it is time to intervene before the drain turns into a complete blockage. Clearing a slow sink is a manageable task that requires more patience than raw power. By working methodically through the P-trap and the stopper mechanism, you can restore full flow without calling a professional or reaching for harsh chemical cleaners that damage your pipes.

1. Remove the Hair Trap. Unscrew the cap or lift the sink stopper out of the drain. Remove any visible hair and slime wrapped around the crossbars or the base of the stopper.
2. Protect Your Cabinet. Place a bucket directly under the P-trap to catch the water that will inevitably spill. Use a towel to absorb any residual moisture on the floor around the vanity.
3. Disconnect the Trap. Loosen the slip nuts on both ends of the U-shaped pipe underneath the sink. Rotate the pipe away from the drain and dump the contents into your bucket.
4. Flush the Blockage Out. Take the removed pipe to a utility sink or outside and flush it with a garden hose or high-pressure spray. Remove any remaining gunk with a bottle brush or a gloved finger.
5. Snake the Wall Pipe. While the trap is off, insert a plastic drain snake or a wire coat hanger into the wall-side pipe. Pull out any obstructions lodged deep in the plumbing line.
6. Verify the Fix. Reconnect the P-trap, tightening the slip nuts by hand until firm. Run hot water through the sink for two minutes to check for leaks at the connections.