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How to Unclog a Drain With Baking Soda and Vinegar

Project Overview
  • Working Time: 20 - 30 mins
  • Total Time: 20 mins - 12 hrs
  • Skill Level: Beginner
  • Estimated Cost: $1 to $5

Baking soda (sodium bicarbonate) is a kitchen staple and a naturally occurring mineral compound that can clean smelly or clogged drains thanks to its disinfectant properties. In addition to combating odor-causing bacteria and fungi, baking soda can dissolve mineral deposits and organic materials such as grease, hair, food, and more. Use baking soda whenever the drain starts to slow or back up. Regular cleaning with baking soda every one to three months may prevent clogs from forming. Combining baking soda with other ingredients such as vinegar can make the cleaning job even more effective.

Here's how to use baking soda as a drain cleaner instead of using harsh chemical drain cleaners or disassembling the drain trap.

How to Use Baking Soda to Unclog a Drain

The Spruce / Theresa Chiechi

What You'll Need

Equipment / Tools

  • Pot
  • Funnel

Materials

  • Boiling water
  • Dish soap
  • Baking soda
  • Distilled white vinegar
  • Salt

Instructions

ingredients for unclogging a bathroom drain
The Spruce / Lacey Johnson 

How to Unclog a Drain With Baking Soda and Vinegar

  1. Heat Boiling Water

    kettle boiling water
    The Spruce / Lacey Johnson 

    Heat boiling water in a tea kettle on the stovetop or in a large pourable measuring cup in the microwave.

  2. Pour Boiling Water and Dish Soap Into Drain

    squeezing dish soap into the drain
    The Spruce / Lacey Johnson  

    Squirt a bit of grease-fighting dish soap into the drain and carefully pour the boiling water down the drain. The dish soap will help dissolve greasy clogs.

  3. Pour Baking Soda Into the Drain

    pouring baking soda down the drain with a funnel
    The Spruce / Lacey Johnson 

    Pour one cup of baking soda into the drain. You can use a measuring cup to do this or use a funnel if you have a smaller drain that makes it hard to pour directly into the drain opening.

  4. Follow With Vinegar

    pouring vinegar down the drain
    The Spruce / Lacey Johnson 

    Pour one cup of distilled white vinegar into the drain. Don't be surprised by the audible reaction that occurs. Baking soda is an alkaline substance and vinegar is a mild acetic acid. When the two are mixed, they react somewhat dramatically to neutralize one another; the fizzing action you hear is the reaction that will often dislodge clogs in your drain.

  5. Flush With More Hot Water

    pouring hot water down the drain
    The Spruce / Lacey Johnson  

    After the fizzing subsides, wait five minutes. Use this time to heat two cups of water to boiling. Flush the drain with this additional boiling water.

    If the drain is now flowing, run hot tap water to flush all debris down the drain. If it is not draining, repeat the previous steps. If you haven't cleaned your drain recently, it may be necessary to repeat the baking soda flush at least twice.

    If a drain clog doesn't clear after two or more attempts, use the baking soda and salt method described below.

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Tip

You can swap out the vinegar for lemon juice for this method if you prefer. This will also add a nice fragrance to your kitchen, an added bonus.

How to Clean a Clogged Drain With Salt and Baking Soda

If the baking soda and vinegar method doesn't unclog the drain, use the salt and baking soda method next. This works best if you do it right before bedtime since the drain won't be used until morning.

  1. Pour Baking Soda Into the Drain

    pouring baking soda down the drain
    The Spruce / Lacey Johnson  

    Pour one cup of baking soda into the clogged drain.

  2. Pour Salt Into the Drain

    pouring salt down the drain
    The Spruce / Lacey Johnson 

    Follow the baking soda with 1/2 cup of salt poured into the drain. Let this mixture sit in the drain for several hours—overnight is best.

  3. Flush With Boiling Water

    pouring boiling water and dish soap down the drain
    The Spruce / Lacey Johnson  

    In the morning, heat two cups of water to a boil, then pour this hot water into the drain.

  4. Flush With Tap Water

    flushing the sink with warm tap water
    The Spruce / Lacey Johnson 

    If the drain begins to drain, continue to flush with hot tap water. If not, you may need to repeat the process or try the baking soda and vinegar method.

    If neither baking soda method opens the drain, it is likely you'll need to disassemble the drain trap to clear the clog.

While You're At It

Once your drain is cleared of the clog, consider giving your garbage disposal a good cleaning. You can also sharpen the blades by dropping a few cubes of ice in, running the cold water, and turning on the disposal for about a minute.

How Often to Clean Your Drains

Weekly, flush drains with boiling water mixed with liquid grease-fighting dish soap, such as Dawn. Clean your drain with baking soda as soon as you notice the water is draining slowly. You can also use this process as a regular maintenance method for your drains. For example, if you keep a box of open baking soda in your refrigerator to absorb odors, use the old baking soda to flush your kitchen drain when it comes time to change the box.

Call an Expert

DIY remedies not working? If your drain is clogging frequently and at-home remedies aren't working, call a plumber to take a look. A bad clog can lead to burst pipes or a leak, so it's important to get a handle on it before it turns into a more serious problem.

Tips for Keeping Your Drains Clean

  • Always use strainer baskets on your drains to keep hair and food particles from going down the drain.
  • Never pour oil or grease down the drain. When cooking greasy or oily foods, wipe the cookware with a paper towel before washing so less grease, oil, and fat go down the drain to form a clog.
  • Regularly add boiling water with a grease-fighting dish soap down the drain to prevent the buildup of greasy clogs.
  • Both the baking-soda-and-vinegar and the baking-soda-and-salt methods can be used to clean and freshen your garbage disposal. To remove odors from a garbage disposal, reduce the required amounts of baking soda, water, vinegar, and salt by half and follow the directions above.
FAQ
  • What is the best ratio of baking soda to vinegar for cleaning drains?

    The best ratio of baking soda to vinegar for cleaning drains is 1 part baking soda to 2 parts vinegar.

  • Does vinegar and baking soda work better than commercial drain cleaners?

    No, vinegar and baking soda are not as effective as commercial drain cleaners. This mixture can be useful for small clogs and as a preventative measure, but it ultimately isn't strong enough for big jobs.

  • Can I use Dawn and baking soda to clean drains?

    Yes, you can use Dawn and baking soda to clean the drains. This helps break down grease and grime build-up in your drain; just make sure to flush it out with hot water afterward.