• Call (800) 479-6583
  • Mon-Fri 8am-5pm
  • |
  • Sat 9am-5pm

How to Get Rid of Sewer Flies


Have you been noticing small flying creatures around your house lately? These creatures are known as sewer flies or drain flies. Sewer flies infest homes that are inviting. They reside in the areas of the house where it is dark, moist, and somewhat cool. Although, they do not cause any harm to humans and pets, having them flying around the house seems unhygienic and extremely annoying. They have the ability to multiply quickly, so it is crucial to get rid of them as soon as you spot one. This guide will explain the methods you can use to get rid of these nuisances.

What Are Sewer Flies?

Sewer flies are also known as drain flies or filter flies. They have small bodies that are mostly black, but in some cases, they may be brown. What makes these flies stand out is the pattern that is on their wings. They are covered with numerous tiny hairs all over their bodies and wings. Crushing this fly will leave a powdery residue.

These Sewer flies are mostly found near drains, but that is not the only place where you can spot them. Sewer flies can be found in any open water sources or leakages. You must check all possible breeding sources, so you can destroy them before they start reproducing.

Signs of Infestation

Before taking any steps, you need to take the drain test that will ensure that you have a sewer fly infestation. To perform the drain test, you will need to cover all the pipes and outlets with a sticky tape. This is so that if the flies try to come out, they will be stuck to the tape.

This method will let you know if you have an infestation to get rid of. Keep in mind that if there are flies stuck on the tape 2-3 days after the tape was placed, then that means there are breeding sources within. You will need to get rid of the breeding sites of the flies as well, so you can stay safe from any future infestations.

6 Guaranteed Methods That Will End Sewer Infestations

  1. Organic Matter – End the Root Source

Unbelievably, one reason why you have sewer flies in your house is that there is a lot of residue in your pipes. As strange as this may sound, there is a possibility for this to happen because older pipes do not have filtration.

Getting rid of the organic matter will take away the food source of the flies. What you will need to do is follow the steps mentioned below:

  • Take a metal pipe brush and put it down in the pipes. Move the brush back and forth until you think that the buildup is ending. There are different sizes of brushes available so you can perform this task with ease.

  • You can pour hot water down the pipes. The hot water will burn the flies, which will ensure that they stop feeding from your pipes. This method will eliminate its breeding sources as well.

  1. Vinegar

Now you can add “killing sewer flies” in the list of things vinegar does. The best vinegar to use for this method is apple cider vinegar. Add ¼ cup of apple cider vinegar to a glass and cover the glass with plastic. Make holes in the plastic wrap that you placed on the glass. Place the glass near the sewer fly infestation. The smell of the vinegar will attract the flies, they will come near the glass, and the vinegar will make them drown.

  1. Baking Soda, Boiling Water and Vinegar

This method is effective in getting rid of the flies and fixing squeaky drains. The things you need are ½ cup of baking soda and 1 cup of vinegar. First, you will need to add baking soda to the pipe and then slowly add the vinegar. When the baking soda encounters the vinegar, it will begin to fizz. The fizzing can cause it to come out of the drain so make sure you do it slowly so it stays inside the pipe.

Let it stay in the drain for an hour or so. After the time is done, pour a pot of hot water so it can wash down the drain. The best part is that this method will kill all the flies, their eggs and the larvae that are hidden.

  1. Drain Gel

If you want something that is stronger than vinegar, then the perfect alternative is Drain Gel. This is a great way to get rid of the flies and to clean out the drain. Pour 4 ounces down the drain and let it sit for a few hours. The longer it sits in the drain the better. Make sure to apply the Drain Gel every day for 5 to 7 days to get the best results.

  1. Do Some Cleaning

Sewer flies like to reside where they can see dirt and water. They hide in the dark areas of your house where they can access their food sources in order to stay alive. Keep all areas of your house clean so you can eliminate their breeding sources and have a clean, fresh house.


To make sure that the sewer flies do not return, you will need to keep your drains clean. Make sure there are no leakages in your kitchen or bathrooms. You can use Insect Growth Regulators that will prevent any future infestations.

There are no products matching the selection.

Contact Us