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Effective Guide On How To Get Rid Of Drain Flies Permanently

Drain flies, also called moth flies, are tiny insects that congregate in sewers, drains, and other places where organic matter builds up. They can be troublesome to get rid of and are a nuisance. Fortunately, there are several methods you may take to get rid of drain flies permanently. These include removing organic material from drains and sewers, using chemical treatments to kill the flies, and using physical barriers and traps to prevent them from entering the area. With effort and patience, you can eliminate drain flies from your home and keep them from returning.

What Causes Drain Flies? 

The presence of drain flies is caused by a combination of factors, including the temperature and humidity levels in the area, the presence of organic matter, and the presence of larvae. Drain flies are attracted to areas with moisture, and they reproduce rapidly in these moist environments. Organic matter can also attract drain flies as they feed on it. The larvae of these flies may also be found in the drains, which can lead to the presence of adult flies.

To prevent drain flies, homeowners should keep drains and other areas around their homes clean and dry. This means regularly cleaning out drains, disposing of organic matter, and maintaining areas prone to standing water as dry as possible. To reduce the chances of larvae developing, homeowners should also use drain covers or filters to ensure no larvae can get into the drains.

How to Identify a Drain Fly Infestation?

Most of us have experienced the unpleasant surprise of discovering an infestation of pests in our homes. From ants and termites to rats and other pests, it’s essential to identify and address the issue quickly to avoid further damage or health issues. The drain fly is one type of pest lurking in your home. Drain flies are small, moth-like insects that can be found near drains and plumbing fixtures of your home. If not identified and addressed quickly, a drain fly infestation can grow rapidly and become a significant nuisance. 

Here’s how to identify a drain fly infestation and what to do about it. 

The presence of flies 

The presence of flies in your home is a sure indication of a drain fly infestation. These small flies, known scientifically as Psychodidae, are commonly found in bathrooms and kitchens, near sinks and drains. They are gray or black, with a somewhat hairy body, and their wings are held over the body in a tent-like fashion. Drain flies feed on decaying organic matter, such as hair, food particles, and other organic debris. They are often found in sink drains and other moist areas. There may be an infestation if you’ve observed an increase in the number of flies in your home.

Presence Of Tiny Eggs Near Plumbing Fixtures

Drain fly eggs are small, white, and oval-shaped and can be found near sink drains, bathtubs, and other plumbing fixtures. They are often found in large clusters and can be difficult to spot without a magnifying glass. If you discover any of these eggs, your home may be infested with drain flies.

Presence Of The Small, Moth-Like Insects

These insects are usually grayish or black and have a wingspan of about 1/4 inch. They are attracted to moisture and fly around sinks, bathtubs, and other damp areas. They can also be found in basements, near window sills, and other wet, dark areas. If you notice a swarm of these small insects flying around your home, this is a sure sign of a drain fly infestation.

How to Get Rid of Drain Flies Permanently?

Are you dealing with an infestation of drain flies? If so, you’re probably looking for the best way to get rid of them. Drain flies which are also known as moth flies are small, dark-colored insects that breed in drains and other moist areas. They lay eggs in slimy layers on the walls of drains, and the larvae feed on organic material. As adults, drain flies are attracted to light and can be seen buzzing around drains, sewer lines, and other moist areas. Fortunately, there are a few steps which you can take to get rid of drain flies permanently. 

Identify The Source Of The Infestation

Drain flies breed in standing water and organic sludge, so you need to look for areas where these conditions occur. Check around the drain in your kitchen or bathroom and other areas in your home that may be damp and moist. Once you’ve identified the source of the infestation, you can begin the process of getting rid of the drain flies.

Clean The Areas Where The Drain Flies Are Breeding

Begin by cleaning the drains and other areas around the home where drain flies may be breeding. Use hot water, bleach, and a stiff brush to remove debris and organic matter. Scrub the drain and surrounding area, and make sure to reach any crevices where the flies may be hiding. If possible, use a vacuum to suck up any remaining debris from the drain and rinse it with hot water. 

Clean The Pipes 

After cleaning the drain, you should also clean the pipes. This can be done by pouring a mixture of baking soda, vinegar, and hot water down the drain. The hot water will help to break up any organic matter in the pipes. In contrast, baking soda and vinegar will help to break down the grease and other organic matter. Once the mixture has been poured down the drain, leave it for a few hours and flush it with hot water. This will help to dislodge any debris that may be stuck in the pipes and will also help to prevent further infestations of drain flies. 

Install Drain Screens

Once the area is clean, the next step is to prevent the drain flies from returning, and the best methods to do these are to install drain screens and traps. Drain screens are small mesh screens that fit over the drain and prevent the drain flies from entering. They can be easily installed and are relatively inexpensive.

Install Traps

Once you’ve installed the screens, the next step is to place traps near the drains and other areas where you’ve seen the drain flies. You can use either sticky traps or baited traps. Sticky traps are made of plastic or cardboard and are coated with a sticky substance. Baited traps are usually made of plastic and contain a bait that attracts the drain flies. Most hardware stores carry both varieties of traps. 

Since flies will be drawn to the trap rather than the drain, install traps at least a few inches away from the drain.

Use Of Insecticides 

There are several products available specifically for drain fly infestations. These insecticides should be applied directly to the drain and the surrounding areas to ensure that the entire area is treated. The insecticides should be reapplied regularly to ensure the drain flies do not return. 

Insecticides should be applied directly to the drains, sink and other areas where the flies are breeding. It is important to use a product specifically designed for use in drains and pipes, as these products are formulated to be highly effective against drain flies. 

Additionally, applying insecticides to the drains and other areas around the house can help to prevent future infestations. It should be applied regularly until the drain flies have been eliminated. This is especially important if the infestation is large. Applying the insecticide correctly and following the instructions on the packaging is essential for the product to work properly. Additionally, it is important to regularly clean the drains, sink, and other areas where the flies may be breeding to ensure the insecticide is applied to the most affected areas. Using insecticides regularly can get rid of drain flies and ensure they don’t return again.


When dealing with drain flies, it is important to remember that prevention is key. Regularly cleaning and emptying the drains will help to ensure that the flies do not return. Additionally, screens should be installed to prevent the flies from entering the drains in the first place. If the flies have already taken up residence in the drain, traps and insecticides can be used to get rid of them permanently.
If the problem persists, it is best to call a professional fly pest control service. Eminent Pest Control in Singapore has a team of experts with extensive knowledge and experience tackling drain fly infestations. Contact Eminent Pest Control in Singapore today for a free consultation and to help you how to get rid of drain flies permanently.

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