How to fix a sink that won't unclog?

Author: Prof. Russel Quitzon  |  Last update: Wednesday, June 3, 2026

Pour one-half cup table salt down the drain, followed by boiling water. Or try a cup of baking soda and a cup of vinegar—let it bubble, wait 15 minutes, then pour boiling water down the drain. You can also try a cup of baking soda and a half-cup of salt; let it sit for several hours, then flush with boiling water.

How to unclog a sink that won't drain?

Use Baking Soda and Vinegar Pour a cup of baking soda into the clogged sink and wait for about four minutes. Afterwards, pour a cup of vinegar down the same sink. Plug the sink and leave it for 10 minutes to break down the blockage. Afterwards, run hot water to see if the clog is gone.

How do you unblock a badly blocked sink?

Baking Soda and Vinegar

Make sure you clear any standing water in the sink first, then pour a cup of baking soda down the drain. Follow this with a cup of vinegar, and immediately put the rubber stopper in the drain. The mixture will fizz, and push the clog down. Follow with hot water from the tap to finish flushing.

What to do if the sink is clogged and the plunger doesn't work?

Bicarbonate of soda (or baking powder) and white vinegar

All you need to do is pop a couple of teaspoons of bicarbonate of soda down the plughole and chase it with a cup of white vinegar. Leave it for about five minutes and then try flushing the blockage with the hot kettle water.

What dissolves a blocked sink?

Vinegar is effective at cutting grease and baking soda causes a reaction with vinegar that bubbles up and helps to remove blockages in the pipe. Pour the baking soda into the drain first, followed by a generous glug of white vinegar. Wait a few minutes until the mixture has stopped fizzing and flush with hot water.

How to Unclog a Sink -- The Right Way

What is the strongest thing to unclog a sink?

The Santeen Sulfuric Acid Drain Opener proved to be the most potent among all the chemical drain cleaners we tested, effectively dissolving 80% of the hair, 80% of the organic matter, 40% of the grease and 76% of the paper products.

Why should you never use baking soda and vinegar to unclog a drain?

Baking soda is abrasive, which, when used in large quantities, will cause the drain more damage. Additionally, the acidic nature of vinegar can eat away rubber and metal, damaging the plumbing. As these products break down the pipe and connectors in the plumbing in your home, it will cause more clogs over time.

Will a clogged sink eventually drain?

While it's not the end of the world, it won't cause immediate damage to your home and the water will eventually drain away, a slow drain is still a problem that needs to be fixed. A drain that is slow to empty will mean there is already a clog in the system and, over time, one that will only get worse.

Can plunging make a clog worse?

One common question people ask is, “Can plunging make a clog worse?” The short answer is yes, but only if you're not using toilet plungers correctly. Using too much force or plunging too vigorously can push the clog further down the drain, making it harder to remove.

How do plumbers unclog sinks?

A manual drain snake, also known as a plumber's snake or a drain auger, is a small boring tool that rotates slowly as it's physically pushed through a stubborn clog. The terminal end of the device is a corkscrew-shaped hook that is fed into a clogged drain or toilet.

How do you unclog a sink ASAP?

All you need to do is simply bring a pot of water to a boil, and then slowly pour it down the drain once it has reached a rolling boil. You may have to repeat this a few times to fully clear the drain clog. Boiling water won't hurt your pipes in the bathroom sink, and you can repeat this method as many times as needed.

What is the best sink unblocker?

9 Best Drain Cleaners, Tested by Experts
  • Best Overall Drain Cleaner. Drano Max Gel Liquid Clog Remover. Read more.
  • Best Drain Cleaner for Hair Clogs. Liquid-Plumr Hair Clog Eliminator. Read more.
  • Best Drain Cleaner for Kitchen Sinks. Green Gobbler Drain Opening Pacs. Read more.

How do you unblock a completely clogged sink?

Start by pouring some boiling water down the drain. Then put 1 mug of soda crystals in the plughole followed by 1 mug of hot water and wait 5 minutes. Pour in another kettleful of boiling water to thoroughly flush and clean the drain. Washing powder can also be an effective sink unblocker.

What is the best liquid to unclog drains?

The best liquid drain cleaner to clear a kitchen sink clog is Hercules Glug® Kitchen Liquid Drain Opener because it is specially formulated to dissolve clogs that contain grease and food particles.

How do you unclog a sink that doesn't work with Drano?

Use ½-1 cup of baking soda and 1 cup of vinegar, plus a bit of water if you want to dilute things a little bit more. Pour it down the drain and let it sit for 30-60 minutes. Sometimes, this mixture can break up clogs that even Drano can't touch!

Will a clog eventually unclog itself?

Yes, a toilet can unclog itself over time, but it depends on what is causing the blockage. If the clog is made up of water-soluble materials, like toilet paper or fecal matter, then eventually they will begin dissolving if you give them enough time.

Can pipes burst from being clogged?

Leaving a clog unattended can lead to increased pressure inside pipes, which can then crack or burst. This is a messy and often expensive problem that can cause significant damage to your plumbing and home.

What happens if you leave a drain clogged too long?

When a drain clog is ignored, the consequences can be serious. Left unchecked, a clogged drain can lead to a variety of plumbing problems, from reduced water pressure to flooding and sewage backups.

How do you unclog a clogged stubborn sink?

  1. Pour a pot of boiling water down your drain.
  2. Pour a mixture of one cup of water and one cup of vinegar down the drain.
  3. Cover the drain with a plug and wait 5–10 minutes.
  4. Flush the sink drain with boiling water.

Is it OK to plunge a clogged sink?

Yes, the simple plunger can unclog your kitchen sink too. When you use the plunger, plug the other holes in you kitchen sink with a rag cloth. Also, ensure that the plunger cup completely covers the clogged kitchen sink hole. Now, keep the plunger in an upright position and plunge about ten times vigorously.

What to do if your sink drain is stuck?

With a cup, scoop out the contents of the sink. This'll make it easier to get to the plug. With a rubber glove on, push down on the plug and attempt to twist it anti clockwise. If that doesn't work, spray WD-40 on to the plug, give it a minute to work itself under the plug, then repeat step 2.

What do you do if your drain won't unclog?

Pour one cup of fresh baking soda down the drain, followed by one cup of white vinegar. Place a rubber stopper or other sink hole cover over the drain opening. Wait 15 minutes to allow the vinegar and baking soda to unclog your drain, Then take out the drain cover and run hot tap water down the drain to clear the clog.

What chemical do plumbers use to unclog drains?

Properties and Uses: Hydrochloric acid, also known as muriatic acid, is a highly corrosive acid used extensively by plumbers to clear severe clogs. It reacts rapidly with organic materials in drains, breaking them down into simpler compounds that can be easily flushed away.

Can I pour boiling water down the drain?

Pouring boiling water is quite risky as it might lead to a steam burn or scalding. Another thing to keep in mind is what type of material you are pouring in into. If you have a porcelain sink, it is likely to crack due to the heat. All in all, pouring boiling water down your drain will only cause issues down the road.

Previous article
How much does it cost to run the dryer per hour?
Next article
Is it better to have an air purifier higher or lower?