How to Clear a Slow-Draining Kitchen Sink

Drains rarely stop working all at once; they warn you with a sluggish, gurgling retreat of water that signals a developing clog. That stubborn slow-drain is usually the result of a buildup of grease, soap scum, and small food particles trapped in the trap assembly under your sink. Fixing this is a classic rite of passage for every homeowner. By manually clearing the P-trap, you bypass the need for harsh chemicals that can damage your pipes and leave the system running smoothly. Done well, this repair restores full flow and eliminates the odor that often accompanies a clogged drain.

1. Clear the Space First. Clear out everything under the sink and place a bucket or deep pan directly beneath the P-trap. Lay down an old towel to catch any stray drips.
2. Break the Nuts Loose. Use tongue-and-groove pliers to turn the slip nuts on both ends of the U-shaped P-trap pipe counter-clockwise. If they are tight, apply firm, steady pressure, but avoid overtightening to prevent cracking the plastic.
3. Scrub the Trap Clean. Slide the trap out and empty the contents into your bucket. Use a stiff wire brush or a gloved finger to scrape out all gunk, hair, and solidified grease from the inside of the pipe.
4. Snake the Wall Pipe. Look into the pipe leading into the wall to see if there is any visible debris. Use a plumbing snake or a flexible bottle brush to reach in and clear any obstructions inside the wall pipe.
5. Reassemble Without Leaks. Place the P-trap back into position, ensuring the slip washers are seated correctly against the joints. Hand-tighten the slip nuts firmly, then give them an extra quarter-turn with your pliers.
6. Verify Full Flow Returns. Run hot water through the sink for at least two minutes to verify that the leak-free connection is secure and the drain is flowing rapidly. If the water drains freely without pooling, the task is complete.