How to Make Your Own Homemade Drain Cleaner

cleaning clogs with a diy drain cleaner illustration

Illustration: The Spruce / Bailey Mariner

Project Overview
  • Working Time: 5 - 10 mins
  • Total Time: 15 - 20 mins
  • Skill Level: Beginner
  • Estimated Cost: $10 to $15

Chemical drain cleaners are dangerous to use, highly poisonous, and so caustic that they can cause skin burns. Even worse, they're not always effective, leaving you with a sink full of toxic chemical water that's stopped up by the same clog you started with. By contrast, a homemade drain cleaner can be perfectly safe, not to mention perfectly inexpensive. To be clear, a homemade cleaner is not more effective than a commercial cleaner, but if neither is going to work, wouldn't you rather have a sink full of a harmless cleaner than a toxic one?

Truth is, you don't always need the strength of a chemical drain cleaner. A slow drain often can be cleared with a homemade drain cleaner concoction consisting of boiling water and a mixture of baking soda and white vinegar. If you've ever made a model volcano erupt with this household concoction, you have an idea of why it works on drains. Baking soda (a base substance called sodium bicarbonate) and vinegar (a mild acetic acid) react together to create a fizzy, bubbly action that releases carbon dioxide, which can loosen up clogs so they can be washed down the drain. Chase the mixture with boiling water, which helps to wash out any clogs or debris, and you've got a reliable recipe for fighting clogs.


Start by using a small amount of drain cleaner to start—less is often more.


Safe Homemade Drain Cleaner Recipe

What You'll Need

Equipment / Tools

  • Cup
  • Bucket
  • Drain stopper


  • Boiling water
  • 1/2 cup Baking soda
  • 1/2 cup White vinegar


Clearing Clogs With a Homemade Drain Cleaner

  1. Clear Out Any Standing Water

    If your sink (or tub or shower) is full of backed-up water, bail out as much of the water as you can by using a cup and dumping the water into a bucket. It's fine to leave a small amount of water down in the drain opening itself, but the sink, shower, or tub should be mostly empty so your drain cleaner can get as close as possible to the clog.

    Standing water in a bathroom sink

    The Spruce / Lacey Johnson

  2. Pour in Boiling Water

    If you're working on a sink or tub drain, first remove the sink pop-up stopperor the tub stopper to gain better access to the drain. Pour a small panful of boiling water into the drain.

    Pouring boiling water down the drain



    Be cautious while pouring the boiling water, as the water may splash or splatter.

  3. Add Baking Soda

    Pour 1/2 cup of baking soda into the drain.

    person pouring baking soda down a sink drain

    The Spruce / Margot Cavin

  4. Introduce the Vinegar

    Pour 1/2 cup of vinegar into the drain.

    person pouring vinegar down a drain

    The Spruce / Margot Cavin

  5. Cover the Drain

    Cover the drain with a stopper, if available, and let the mixture work for 10 minutes. The baking soda and vinegar will fizz and bubble a lot; covering the drain forces the reaction downward instead of up and out of the drain, but it's not critical that you cover the drain.

    person covering the drain with a stopper

    The Spruce / Margot Cavin

  6. Add More Boiling Water

    Pour another pot of boiling water into the drain. This will help wash away any clogs that the baking soda and vinegar loosened up.

    Pouring boiling water down the drain again

    The Spruce / Lacey Johnson

  7. Clear the Drain

    Flush the drain with hot water from the tap to help remove any remaining debris from the drain pipe.

    Flushing the sink with water from the tap

    The Spruce / Lacey Johnson

  8. Repeat as Needed

    It can take a few tries with this low-cost, eco-friendly drain cleaner to completely clear your drain, particularly if your drain is especially slow or clogged. If you notice some improvement after the first attempt, try the drain cleaner again. If the drain is still slow after multiple attempts, you may need to try a more extreme solution.

    Repeating the process to eliminate a clogged drain

    The Spruce / Lacey Johnson


    Once your drain is clear, make a habit of flushing it out semi-regularly by pouring boiling water down the drain. This regular maintenance can help wash away or break up debris before they form clogs.

If this remedy doesn't clear the clog, it's time to consider disassembling the drain trap, if possible, and/or snaking the drain with a drain snake. Place a bucket under the trap before removing it to catch water (and crud). The nice thing about using a homemade drain cleaner is that you don't have to worry about nasty chemicals pouring out along with the water.

The Science Behind Homemade Drain Cleaners

For the science buffs in the family, the chemical reaction in the baking soda and vinegar mixture can be written as CH3COOH + NaHCO3 = CH3COONa + CO2 + H2O. In addition to making great "lava," the chemical reaction of baking soda and vinegar can propel model rockets and other vehicles.

Article Sources
The Spruce uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. Mckenzie, L. B., et al. Household Cleaning Product-Related Injuries Treated in US Emergency Departments in 1990-2006. Pediatrics, vol. 126, no. 3, 2010, pp. 509–516., doi:10.1542/peds.2009-3392