How to Unclog a Sink Drain
Clear slow or fully blocked sink drains using safe, effective methods before calling a plumber.
Step-by-Step Instructions
Try the Boiling Water Method First
For minor grease or soap buildup, boil a full kettle of water. Pour it directly down the drain in two stages, letting it work for a few seconds between pours. Hot water melts grease and soap scum that has solidified in the pipe. This alone fixes about 30% of clogs.
Use Baking Soda and Vinegar
Pour half a cup of baking soda down the drain, followed by half a cup of white vinegar. Cover the drain opening with a wet cloth or stopper to force the reaction downward. Wait 15-20 minutes, then flush with another kettle of boiling water. The fizzing action breaks up organic matter.
Plunge the Drain
Seal the overflow opening with a wet rag — this creates pressure. Fill the sink with a few inches of water to cover the plunger cup. Place the plunger directly over the drain and pump vigorously up and down 10-15 times. The pressure difference can dislodge the blockage.
Use a Zip-It Tool
A zip-it tool is a long, flexible plastic strip with barbed edges that you slide down the drain. It catches and pulls out hair and gunk. Push it down as far as it will go, wiggle it, then pull it straight back out slowly. It is gross but incredibly effective for hair clogs.
Try a Drain Snake (Auger)
Feed the end of a manual drain snake into the drain, turning the handle clockwise as you push. When you feel resistance, you have hit the clog. Continue turning to break it up or hook it, then pull the snake back out. Wear gloves — the snake will be covered in sludge.
Remove and Clean the P-Trap
Place a bucket under the P-trap (the U-shaped pipe under the sink). Loosen the slip nuts on both ends with an adjustable wrench or by hand. Remove the trap and clean out any debris inside. Use an old toothbrush to scrub the inside. Reattach and hand-tighten the nuts.
Clean the Pop-Up Stopper
Many bathroom sink clogs occur right at the pop-up stopper mechanism. Unscrew the pivot rod nut behind the sink, pull out the rod, and lift the stopper out of the drain. You will likely find a ball of hair and soap scum wrapped around it. Clean it thoroughly and reinstall.
Reassemble and Test
Put everything back together: the P-trap, the pop-up stopper, and any removed hardware. Run hot water for 30-60 seconds and observe the drain. It should empty quickly and quietly. If it is still slow, there may be a deeper blockage in the wall pipe.
Prevent Future Clogs
Pour a mixture of baking soda and vinegar down the drain once a month as maintenance. Install a mesh drain strainer to catch hair and debris before it enters the pipe. Never pour grease, oil, or coffee grounds down a sink drain.
Know When to Call a Pro
If multiple drains in your home are slow, the clog may be in the main sewer line — that requires professional equipment. If you have tried every method above and the drain is still blocked, it is time to call Complete Handyman Services. We have commercial-grade augers that can clear any blockage.
Rather Have a Pro Handle It?
No shame in calling the experts. Our handymen can handle this repair quickly, safely, and with a guarantee.