Are you tired of those pesky little flies buzzing around your sink? You might be dealing with drain flies, also known as moth flies, sewer flies, or sink flies. These tiny pests can quickly become a nuisance in your home.
In this comprehensive guide, we’ll explore how to get rid of drain flies quickly and prevent them from coming back. Whether you’re in Logan, Brisbane, or around Australia, these easy steps will help you eliminate drain flies fast and keep your home pest-free.
What Are Drain Flies and Why Are They in My Sink?

Drain flies are small, moth-like insects that thrive in moist environments. They’re often found around and inside drains, hence their name. These pests are attracted to stagnant water and organic matter that accumulates in drains, making your kitchen and bathroom the perfect breeding ground.
They’re not to be confused with fruit flies, which are attracted to rotting fruit and vegetables.
Signs You Have a Drain Fly Infestation
Here are some signs that you might have a drain fly problem:
1. Small, moth-like flies buzzing around your sink or bathroom drain
2. Flies that appear in the evening and are attracted to light
3. Tiny, dark-coloured flies resting on walls near drains, they can be both black and brown in colour
4. A sudden increase in fly activity around your kitchen or bathroom drain pipes
Are Drain Flies Harmful?
While drain flies aren’t known to bite or transmit diseases directly, they can be more than just an annoyance. These pests can:
- Contaminate food and surfaces with bacteria
- Trigger allergic reactions in some people
- Indicate underlying plumbing issues or poor sanitation
To make matters worse, drain flies breed quickly and drain fly larvae feed on the organic matter in your pipes. So, if you don’t stop the life cycle, your drain fly issues will keep coming back.
Female drain flies are capable of laying between 10 and 200 eggs at a time within the buildup of organic matter in your plumbing system.
The ideal breeding ground for drain flies includes:
- Discarded grease and fats
- Hair and other debris
- Food particles
- Oils and other organic materials
- Inside septic tanks
The warm, humid climate can create ideal conditions for drain fly infestations. Be extra vigilant about preventing standing water and keeping your drains clean.
7 Easy Ways to Get Rid of Drain Flies Fast

DIY Drain Cleaning Method
The first step to eradicate drain flies is to remove their food source and habitat. Here’s how:
1. Pour boiling water down the drain to loosen debris
2. Use a drain brush to scrub the inside of the pipe
3. Mix 1 cup of vinegar with 1/2 cup of baking soda and pour it down the drain
4. Let the mixture sit for a few hours, then flush with hot water
Use Apple Cider Vinegar Traps
Apple cider vinegar is an excellent natural attractant for drain flies. To make a trap to attract the drain flies:
1. Fill a small bowl with apple cider vinegar
2. Add a few drops of dish soap
3. Cover the bowl with plastic wrap and poke small holes in it
4. Place the trap near affected drains
The flies will be attracted to the vinegar, enter through the holes, and become trapped in the liquid.
Try Sticky Traps
Sticky traps, available at hardware stores, can help catch adult drain flies and monitor the severity of the infestation. Place them near affected floor drains and replace them as needed.
Use a Natural Drain Cleaner
Commercial drain cleaners can be harsh on your pipes and the environment. Instead, try this natural solution:
1. Pour 1/2 cup of salt and 1/2 cup of baking soda down the drain
2. Follow with 1 cup of vinegar
3. Let the mixture sit in the drain overnight, then flush with hot water in the morning
Eliminate Standing Water
Drain flies love stagnant water. Check for and eliminate any sources of standing water in your home, including:
1. Leaky pipes
2. Air conditioner drain pans
3. Plant saucers
4. Clogged gutters
Try a Drain Snake or Plunger
Sometimes, drain flies persist due to a clog deep in the pipe. Use a drain snake or plunger to remove any stubborn blockages that might be providing a breeding ground for drain flies. And if this doesn’t work…
Call a Professional Plumber
If you’ve tried these methods and still can’t get rid of drain flies, it might be time to call our expert plumbers at Drain Defenders. We can:
1. Inspect your drains for hidden issues using our CCTV drain cameras
2. Perform thorough chemical free drain cleaning services with our hydrojetting machine
3. Address any underlying plumbing problems contributing to the infestation
How to Prevent Drain Flies from Coming Back

Once you’ve successfully removed the drain flies, take these steps to prevent them from returning:
1. Regularly clean and sanitise your drains
2. Fix any leaking taps promptly to avoid water dripping or pooling
3. Use drain covers to prevent debris from entering pipes
4. Run water down rarely used drains to prevent stagnation
5. Keep your kitchen and bathroom clean and dry
Getting rid of drain flies requires a combination of thorough cleaning, targeted treatments, and preventive measures. By following these easy steps and staying vigilant, you can eliminate drain flies quickly and keep your home free from these pesky insects.
Remember, persistence is key. If you still have trouble after trying these methods, don’t hesitate to call our friendly plumbing team on 07 3477 9978. We’ll help you get on top of your drain fly problem and prevent drain fly infestations coming back.