How To Get Rid Of Gnats In Drain

How To Get Rid Of Gnats In Drain

Gnats are tiny, pesky, and persistent insects that can be found in the home in large numbers. Gnats breed quickly, and once they have entered your home through a drain, they can be hard to get rid of. These tiny nuisances can not only be annoying but also of potential health risks. Gnats can contaminate food, increasing the risk of foodborne illness, and can also cause respiratory problems. Therefore, it is crucial to learn how to get rid of gnats in drain and prevent their return. In this article, we will explore effective and natural ways to eliminate gnats in drains and their larvae.

What are gnats?

Gnats are small, fragile insects, typically no more than one-eighth of an inch long, with two transparent wings. The flies belong to the insect family Sciaridae and are also called fungus gnats. They breed in damp, organic materials and thrive in moist environments. Gnats are especially common in homes that have standing water, leaky plumbing, or any other form of dampness. They can lay up to 300 eggs at one time, which hatch into larvae in just a few days.

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What Causes Gnats?

Gnats are typically attracted to wet and decaying organic materials and can breed quickly in drains, garbage disposals, or any other moist environment within the house. Furthermore, gnats can breed rapidly in plant soil, especially if it is not allowed to dry out between watering. Poor drainage and overwatering can keep the soil saturated, creating humid conditions favorable for gnat infestation.

How to Get Rid of Gnats in Drain

There are several methods you can use to get rid of gnats in drains. You can use natural remedies like vinegar, bleach, and baking soda, or opt for store-bought drain cleaners. Here are six methods essential for getting rid of gnats in your drains:

1. Boiling Water

Boiling water is a simple yet very effective way of killing gnats in drain. It can break up any organic material that may be harboring the insects and flushing them out of the pipes. All you need to do is boil a pot of water and pour it down the drain. Repeat this process once a day for a week or until the gnats are gone completely. This method may not be effective if the infestation has moved deeper into the sewer line.

2. Vinegar

Vinegar is acidic and can destroy the food sources that gnats thrive on. It is, therefore, an excellent natural remedy to get rid of gnats in drains, and it smells good too. You will need a spray bottle and white vinegar. Mix the white vinegar and water in equal parts and pour the solution into a spray bottle. Spray the drains with the vinegar solution generously, let it sit for an hour, and then flush the drain with hot water. This should kill the gnats and prevent them from returning.

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3. Baking Soda & Vinegar

A mixture of baking soda and vinegar is another natural remedy to get rid of gnats in drains. The combination creates a chemical reaction that can help dissolve any organic matter, such as hair or grease, that the gnats could be breeding in. To create this mixture, pour a cup of baking soda into the drain before pouring a cup of vinegar on top of it. The mixture will bubble up, and when the bubbling subsides, flush the drain with hot water. Repeat the process once a week, and the gnats will eventually die off.

4. Citrus Fruits

Citrus fruits, such as lemons and oranges, contain a natural insecticide called limonene, which can help repel gnats. Cut up the fruit into small pieces and pour them down the drain. Let the pieces sit for an hour before flushing the drain with clean water.

5. Bleach

Bleach is a powerful disinfectant that can kill gnats and any other bacteria, viruses, or fungus in the drain. To use bleach to get rid of gnats in drains, pour a cup of bleach down the drain and wait for an hour. After an hour, flush the drain with hot water. Do this at least once a week, and you will get rid of the gnats in no time.

6. Commercial Drain Cleaners

If natural remedies do not work, you can use commercial drain cleaners to get rid of gnats in the drain. Commercial cleaners can be harsh, so be sure to read the label and use them appropriately. Wear gloves and goggles for your safety. Follow the instructions on the label, and be sure to flush the drain with hot water. The drain cleaner will kill the gnats and any other build-up in the drain.

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Frequently Asked Questions About Getting Rid of Gnats in the Drain

1. What are the signs that I have a drain gnat infestation?

The most common signs of a drain gnat infestation are seeing the gnats in the kitchen, bathroom, or other damp areas of the house. Another sign is when you notice tiny eggs and larvae around the drain or near organic matter. When flies are annoyingly buzzing around, these are probably drain gnats.

2. How can I prevent gnats from coming back?

Preventing gnats from returning is as important as getting rid of them. Ensure that your drain and sink are wiped dry after every use. Never leave standing water in the sink or any other part of the house. Also, avoid overwatering your plants, ensure proper ventilation, and keep the garbage area clean.

3. Is it dangerous to have gnats in my home?

Gnats do not pose any serious health risk to humans. However, as they breed in organic matter, they can contaminate food, making it unsafe to eat. Gnats can also worsen allergies, trigger asthma attacks or cause respiratory problems for people with sensitive respiratory systems.

4. Can drain gnats spread disease?

While gnats may not spread diseases, they can introduce bacteria into the home through contaminated food or garbage. In rare cases, a fungal infection called “sciarid mycosis” can occur among individuals with low immunity. However, this is very rare.


Gnat infestation in drains can be worrisome and persistent if not handled adequately. However, with the right approach, it is possible to get rid of gnats in drains and prevent them from coming back. Always remember that prevention is better than cure, follow the tips above to prevent gnats from breeding in the first place.

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