


Insects are gross, but nothing’s worse than seeing those tiny flies lounging around your sink, right? You’re scrubbing dishes or brushing your teeth, and suddenly—there they are, making your drains their own personal playground. It’s frustrating!
Of course, you want them gone for good, and you’d rather not have to call in a blocked drain service every time they appear. In this post, we’ll show you exactly how to get rid of drain flies permanently—DIY style!
5 Ways to Get Rid of Drain Flies Permanently
So, you’re probably here because you’ve Googled how to get rid of drain flies right? These little creatures, no bigger than a sesame seed, love hanging out in your drains.
The good news? There are several easy and effective ways to send them packing for good. Here’s how!
1. Pour Commercial Drain Cleaner

First things first—if you’ve noticed smelly drains recently, it’s a sign that drain flies may have laid their eggs down there. The larvae thrive in all that gunk, which is why using a commercial drain cleaner is an excellent first step.
These cleaners are specifically designed to dissolve organic matter, which is exactly what drain fly larvae feed on.
So, pour the cleaner down the drain, let it sit for the time recommended on the product (usually around 15-30 minutes), and then flush it down with water. This will help keep your drains fresh and clear of any pests.
2. Use Baking Soda and Vinegar

Now, here’s a fun, eco-friendly way to tackle those flies: the classic baking soda and vinegar combo. To use this natural drain fly killer, start by pouring about half a cup of baking soda down the drain. Then, follow it up with half a cup of vinegar.
You’ll see some fizzing—that’s the magic happening! Let this mixture sit in the drain for at least an hour. After that, instead of using boiling water (which could potentially damage your pipes or sink), rinse it out with warm water. This will keep your plumbing safe while ensuring those flies don’t stand a chance.
3. Make an Apple Cider Vinegar Trap

For those dealing with drain flies in Australia, or anywhere really, this next trick is super simple but effective. Grab a small bowl and pour in some apple cider vinegar, about halfway full. Cover the bowl with plastic wrap and poke a few small holes in the top.
The smell of the vinegar will attract the flies, and once they’re inside, they’ll have a hard time escaping. Place these traps around the areas where you’ve seen the most activity, and you’ll start seeing results quickly. It’s an easy, DIY solution that works like a charm.
4. Clean the Sink Overflow

Don’t forget to check the sink overflow! This hidden area often gets overlooked but can be a major breeding ground for flies. To clean it, use a small brush, like an old toothbrush, and some disinfectant to scrub inside the overflow holes.
Not only does this clear out any buildup that could be harbouring eggs and larvae, but it also helps to unblock a drain if there’s any lingering gunk. You’ll prevent future fly infestations and keep your sink smelling fresh.
5. Use a Drain Brush

Sometimes, when a drain cleaner doesn’t fully do the trick, a drain brush is your best bet. To really master how to kill drain flies, insert the brush deep into the drain and scrub thoroughly to remove any debris or organic matter that flies love to breed in.
This physical cleaning helps eliminate their breeding grounds, leaving them with no place to lay eggs. It’s a simple, hands-on method that can make a big difference in keeping your drains fly-free.
FAQ About Getting Rid of Drain Flies
Are Drain Flies Harmful?
No, drain flies aren’t harmful to humans. They don’t bite or spread disease, but they can be a nuisance.
Why do I suddenly have drain flies?
Drain flies appear when there’s standing water or organic material in your drains. They breed in areas with moisture and gunk.
How do I find the source of drain flies?
Check your drains, sink overflow, and any damp areas like under the sink. These are their favourite spots for breeding.
What time of day are drain flies most active?
Drain flies are most active in the evening and at night, especially near lights or around the drains.
Conclusion
While drain flies aren’t harmful to humans, they can definitely be annoying when they start swarming around your home. However, if the problem persists or you notice other serious drain issues, it might be time to call in the experts.
Need professional help? Contact Neighbourhood Plumbing for a thorough inspection and solutions to all your drain problems. Let the pros handle it so you can enjoy a fly-free home!
About the Author
From unclogging the toughest drains to repairing leaking toilets, Ricky is a seasoned plumber who has brought his craftmanship to homes across Melbourne. He is passionate about sharing plumbing tips just as much as he is about fixing your plumbing issues. So, when your taps or pipes begin leaking, you know who to call.