How to Unclog a Sink with Baking Soda and Vinegar

Looking for a simple and effective way to unclog your sink? Baking soda and vinegar is a tried and true method that can help get your drain flowing again in no time.

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The most important thing you’ll need for this project is a good amount of baking soda and vinegar. Baking soda is a natural cleaning agent and vinegar is an acid that will break down the clog. You’ll also need a pot of boiling water.

Baking Soda

You can use baking soda, or sodium bicarbonate, to unclog a sink naturally. It’s a more gentle cleaning agent than chlorine bleach and doesn’t produce toxic fumes. While effective, this method is slow and you’ll need to be patient while the clog works its way through the drain.

Baking soda is also known as bicarbonate of soda or simply bread soda. It’s a white powder that’s often used in baking, but it also has many other uses around the house. When mixed with vinegar, it produces carbon dioxide gas, which gives baking soda its power to unclog drains.


Pour a cup of vinegar down the clogged drain, followed by a cup of hot water. Allow the mixture to sit for 30 minutes, then flush the drain with hot water.

Boiling Water (optional)

If the clog is due to grease, pouring a pot of boiling water down the drain may be enough to loosen it. This method isn’t as effective on hair clogs.

The Process

If your sink is starting to look like a science experiment gone wrong, don’t fret. You can easily unclog your sink with a few ingredients that you probably already have in your kitchen. All you need is some baking soda, vinegar, and hot water. Here’s how to do it.

Step One: Boil Water (optional)

If you want, you can start by boiling a pot of water. This will help to loosen any greasy build-up in your drain. If you have a double sink, plug one side so you don’t accidentally pour hot water down the wrong drain.

Pour the boiling water down the drain and wait a few minutes. Boiling water alone may be enough to break up the clog and allow it to wash away.

Step Two: Pour Baking Soda Down the Drain

After you’ve removed as much standing water as possible, it’s time to give your drain a good cleaning. For this, you’ll need baking soda and vinegar.

Start by pouring a cup of baking soda down the drain, then follow it with a cup of vinegar. Let the mixture sit for a few minutes before running hot water down the drain to flush it out.

Step Three: Add Vinegar

Pour one cup of vinegar down the drain and plug it with a rubber stopper. Allow the vinegar to sit for 10 minutes. This will give it time to break up any grease or hair that’s causing the clog.

Step Four: Let It Sit

After you’ve let the baking soda and vinegar mixture sit for a few minutes, run the hot water in the sink to see if it’s unclogged. If not, you can try using a plunger to dislodge the clog. Place the plunger over the sink’s drain hole and push and pull the plunger up and down.

Step Five: Rinse with Hot Water

Using a pot of boiling water, rinse the sink to remove any residue. Be sure to do this step quickly so the heat doesn’t damage your sink.

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