How to Clear a Slow Bathroom Sink Drain

Drainage issues in the bathroom almost always begin at the sink stopper and the P-trap. Over time, a mix of soap scum, toothpaste, and hair forms a stubborn blockage that slows flow to a crawl. You do not need harsh chemicals that damage pipes to fix this; simple mechanical removal is both faster and better for your plumbing system. Working on a drain requires patience and a good light source. Once you clear the immediate obstruction at the stopper, the water should flow freely again. If it does not, moving to the P-trap is your next logical step. Keep a bucket nearby, stay methodical, and you will have your sink draining at full speed in twenty minutes.

1. Release the stopper linkage. Look under the sink for the horizontal pivot rod connected to the drain tailpiece. Loosen the retaining nut holding the rod in place, pull the rod out just enough to release the stopper, and then lift the stopper straight out of the basin.
2. Pull out trapped hair. Reach into the drain opening with a pair of needle-nose pliers or a plastic drain snake tool. Pull out the accumulated hair and gunk that has snagged on the stopper linkage.
3. Contain the spill. Place a small bucket or a shallow pan directly underneath the P-trap. This will catch the stagnant water that spills out once you loosen the pipe fittings.
4. Disconnect the P-trap. Loosen the two slip nuts on either side of the U-shaped P-trap using your hands or a pair of channel-lock pliers. Slide the trap off the pipes and empty the contents into your bucket.
5. Brush out the blockage. Use a stiff bottle brush or a rag to scrub the inside of the P-trap thoroughly. Ensure the smooth interior surface is free of any buildup that might catch future debris.
6. Test the seal. Slide the P-trap back into place, hand-tighten the slip nuts, and replace the stopper. Run hot water for two minutes to ensure the seals are watertight and the drainage is clear.