Understanding and Controlling Drain Flies in Your Home: A Bunnings Guide
Drain flies, also known as moth flies, are small, winged insects that breed in moist, decaying organic matter found in drains. They're a common household pest, and while they don't transmit diseases, they can be a nuisance. This guide will help you understand drain flies, their life cycle, and how to control them using products available at Bunnings.
Identifying Drain Flies
Drain flies are small, about 2-5mm in size, with a fuzzy body and long antennae. They have a distinctive 'moth-like' appearance, with a greyish or brownish body and clear wings with a dark border. They're often seen hovering around drains, sinks, and showers, and may be mistaken for fruit flies.
Life Cycle of Drain Flies
Drain flies go through a complete metamorphosis, with four stages: egg, larva, pupa, and adult. The entire life cycle can take as little as 10-14 days. Eggs are laid in masses on the surface of decaying organic matter in drains, and larvae feed on this matter, growing and molting several times before pupating. Adults emerge from the pupal case and live for about 10-25 days, during which time the females lay more eggs, continuing the cycle.

Common Habitats and Breeding Sites
- Drains, especially those that are rarely used or have slow-moving water.
- Sinks and showers with standing water.
- Sewer lines and septic tanks.
- Overripe fruits and vegetables left out in the open.
Controlling Drain Flies: Products from Bunnings
Bunnings offers a range of products to help you control drain flies. Here are some effective solutions:
Drain Cleaners
Regular use of drain cleaners can help prevent the buildup of organic matter that drain flies feed on. Bunnings offers a variety of drain cleaners, including enzymatic cleaners that use natural bacteria to break down organic matter, and chemical cleaners that dissolve organic buildup.
Insecticides
Insecticides can be used to kill adult drain flies and larvae. Bunnings offers a range of insecticides, including foggers that can be used to treat entire rooms, and sprays that can be applied directly to drains and other breeding sites. Always follow the manufacturer's instructions when using insecticides.

Fly Traps
Fly traps can be used to catch adult drain flies, preventing them from laying more eggs. Bunnings offers a range of fly traps, including sticky traps that catch flies on contact, and bait traps that attract flies with a food-based lure.
Preventive Measures
Preventing drain flies from breeding in the first place is the best way to control them. Here are some preventive measures you can take:
- Regularly clean drains, sinks, and showers to remove organic buildup.
- Ensure that drains are properly sealed and that there are no leaks or standing water.
- Avoid leaving overripe fruits and vegetables out in the open.
- Regularly dispose of garbage and recycling to prevent the buildup of organic matter.
When to Call a Professional
While many drain fly infestations can be controlled with over-the-counter products, some infestations may be too large or too difficult to treat on your own. If you suspect that you have a large infestation, or if you're having trouble controlling drain flies, it's a good idea to call a professional pest control service. They have the tools and expertise to effectively treat even the most stubborn infestations.







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