Pest Away Tips

5 Effective Ways to Get Rid of Drain Flies!

Drain Flies: The Insect that Thrives in Dirty Places

Picture this – you’re getting ready to take a well-deserved bath after a long day at work. As you open the drain, you notice tiny insects flying around it.

They’re too tiny to be mosquitos, yet too many to ignore. You reached out to swat them away but alas, they keep coming back.

You start to wonder, “What are these small flying insects? And why are they choosing my drain as their haven?”

The answer is simple – you’re dealing with a drain fly, also known as a moth fly or sewage gnat.

These pesky critters thrive in damp and dirty places, particularly in drains. In this article, we’ll delve into what drain flies are, their life cycle, and how to get rid of them effectively.

What are Drain Flies? Drain flies are tiny insects that belong to the family Psychodidae, which includes more than 2,500 species worldwide.

They are typically small, measuring around 1.5 to 5 mm in length, with tan or brownish bodies and hairy wings. These insects love breeding in places where there’s an abundance of organic matter, such as decaying leaves, sewage systems, and drain pipes.

Types of Drain Flies

There are several species of drain flies, the most common of which include:

1. Psychoda Alternata – This is the most commonly found species of drain flies in the UK, Europe, and North America.

2. Clogmia Albipunctata – This species is usually found in the southern hemisphere, particularly in Australia.

3. Telmatoscopus Albipunctatus – This species is most commonly found in the north of Europe.

Despite the different species, all drain flies share the same habits and preferences. They love to lay their eggs in moist environments, especially drains that have a buildup of organic matter.

Life Cycle of Drain Flies

Drain flies have a relatively short life cycle, which consists of four stages: eggs, larvae, pupae, and adults. The eggs are tiny, measuring around 0.5mm in length.

They are laid in areas with an abundance of organic matter, such as inside drain pipes, and can hatch within two days. The eggs soon become larvae that feed on the organic matter around them.

The larvae will then form a protective cocoon and pupate. After pupating for around a week, adult drain flies emerge and reproduce, starting the cycle again.

How to Get Rid of Drain Flies

If you’re experiencing a drain fly infestation, the good news is that there are ways to get rid of them. Here are some effective methods to try:


Drain Cleaning – Since drain flies breed in drains, the first step in getting rid of them is to clean your drains thoroughly. Pour boiling water down the drain to kill any eggs or larvae present.

This will also help to dissolve any organic matter, making it an unfavorable breeding ground for drain flies. 2.

Vinegar and Baking Soda – Mix equal parts of vinegar and baking soda to create a paste, then pour it down the drain and let it sit for 30 minutes to an hour. The reaction will help to dissolve any gunk in your drain and kill any larvae or eggs present.

3. Chemical Drain Cleaners – If all else fails, you can use chemical drain cleaners.

These substances can dissolve organic matter, but they can also corrode pipes and are harmful to the environment. Make sure you use them sparingly and follow the instructions carefully.

Prevention is Key

The best way to deal with drain flies is to prevent them from breeding in your drains in the first place. Here are some simple steps to keep drain flies at bay:


Keep Your Drains Clean – Regularly cleaning your drains can help prevent the buildup of organic matter. 2.

Use Drain Covers – Installing drain covers can help prevent hair, food, and other debris from clogging your drains. 3.

Fix Leaks – Leaking pipes can create a damp environment, which is ideal breeding ground for drain flies. Fix any leaks to ensure your pipes are dry.


Drain flies may seem like a minor irritation, but an infestation can quickly spiral out of control. Learning about their habits, nature, and how to get rid of them is the first step in preventing infestations.

By following the prevention tips outlined in this article, you can keep your drains clear of these pesky insects and keep your home clean and free of unwanted pests. In conclusion, drain flies are tiny, yet extremely annoying insects that thrive in damp areas and breed in drains with organic matter build-up.

They have a short life cycle, and effective ways to get rid of them include cleaning your drains thoroughly, using vinegar and baking soda, and chemical drain cleaners. Prevention is key when it comes to dealing with drain flies, and keeping your drains clean, using drain covers, and fixing leaks can help keep these pests at bay.

By implementing these measures, you can protect your home from an unwanted drain fly infestation, and keep your living space clean and hygienic.

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