What are drain flies?

Drain flies are the insects that look like moths, their scientific name is Psychodidae. These can often be known as drain flies, sink flies, filter flies, sewer flies, and also moth flies due to their appearance. These are different names given for this species by different countries, but in the UK these Psychodidae are commonly called Drain flies. There are 2,600 species of these drain flies and they originated from humid tropics. These pests can cause several health risks.



These drain flies are attracted by stagnant, shallow water, and organic debris and they are mostly found in areas where bacteria can build. Some of the common places for drain flies are sinks, showers, drainage, and other standing wastewater areas. It is improper maintenance of sewage or sink pipes will attract drain flies.

Are drain flies harmful?

Compared to other types of insects, drain flies are not harmful. They have a very short lifespan, so they do not travel far. But they will roam inside your home and can spread bacteria around the home. They are a tiny nuisance and it is important to eliminate them to prevent your home from bacterial infection and pest infestation.

Drain Flies Infestations

Drain flies can be often seen inside your bathroom, sink, and even in drain holes. You can often see tiny moth-like insects roaming around in areas with a problem, and it can be an indication that your pipes are not properly maintained. You can find thin, and tube-like drain larvae at the top of your drainage pipe, if you cannot find that, then the infestation may be deeper. You could need a professional pest controller to eliminate this tiny pest.

How to Get Rid of Drain Flies

There are a number of ways that you can defend against the presence of drain flies. You can use both natural and chemical methods to get rid of them. Here are some of the natural/DIY methods to get rid of drain flies.

  • If you found any blockage or hole in your drain pipes, try to solve the issue. Clean your pipes weekly, you can use a long brush to maintain a gap between your hand and pipes.
  • You can also make use of the boiled water to eliminate the presence of drain flies. Pouring the hot water into the drain pipes will destroy the entire microorganisms present inside the pipe.
  • Mixing the ½ cup of baking soda with a cup of vinegar makes a perfect cleaning solution for your drain pipes. Pour the solution into the pipes once a week will effectively remove and destroy all the files present inside the pipe.


I hope that this article may give you simple guidance to eliminate the drain flies. The DIY methods listed above can defend only for a few days, you should repeat the process regularly.

Back to blog