What to Pour Down Drain to Kill Roaches?

Dealing with a roach infestation can be a distressing experience. While there are various methods to eradicate roaches, pouring specific substances down the drain can be an effective way to target their hiding places. This guide provides a detailed overview of what to pour down the drain to kill roaches, ensuring a cleaner and roach-free environment.

Also, learn How to Stop Roaches From Coming up the Drain?

Boiling Water

One of the simplest and most readily available remedies to eliminate roaches from drains is boiling water. Carefully pour a kettle or pot of boiling water down the drain. The high-temperature scalds and kills roaches and their eggs on contact, making it an effective initial step in combating the infestation.

Vinegar Solution

Vinegar is a natural household ingredient known for its strong odor and antimicrobial properties. Create a vinegar solution by mixing equal parts of white vinegar and water. Pour the solution down the drain, ensuring it reaches the affected areas. The strong scent repels roaches, while the acidity of vinegar disrupts their respiratory system, effectively killing them.

Baking Soda and Vinegar

Combining baking soda and vinegar creates a powerful natural cleaning agent that can help eliminate roaches. Start by pouring a cup of baking soda down the drain, followed by a cup of vinegar. Allow the mixture to fizz and sit for about 15 minutes, then flush it with boiling water. This combination not only kills roaches but also helps remove any organic debris or blockages that might be attracting them.

Boric Acid Solution

Boric acid is a commonly used insecticide that is highly effective against roaches. Create a boric acid solution by dissolving one teaspoon of boric acid powder in a cup of warm water. Pour the solution down the drain, ensuring it coats the interior surfaces. Boric acid is toxic to roaches, and as they come into contact with the solution, it damages their exoskeleton and eventually leads to their demise.

Essential Oils

Certain essential oils have repellent properties that can deter roaches from drains. Peppermint oil, eucalyptus oil, and tea tree oil are known for their strong scents that roaches find unpleasant. Mix a few drops of these essential oils with water and pour the solution down the drain. The lingering aroma will discourage roaches from entering the treated area.

Commercial Drain Cleaners

There are numerous commercial drain cleaners available in the market specifically formulated to eliminate roaches and other pests. These products often contain potent chemicals that kill roaches upon contact and help dissolve any organic matter clogging the drain. Follow the manufacturer’s instructions carefully when using commercial drain cleaners, and ensure proper ventilation during the process.


When confronted with a roach infestation, targeting their hiding places, such as drains, is crucial. By using the appropriate substances, such as boiling water, vinegar solutions, baking soda and vinegar mixtures, boric acid solutions, essential oils, or commercial drain cleaners, you can effectively kill roaches and prevent their reoccurrence. Remember to maintain good sanitation practices, fix any plumbing issues, and seal off entry points to prevent further infestations.

Leave a Comment