Drain Flies Removal and Prevention

Welcome to our guide on drain flies! If you’ve ever encountered these tiny, pesky insects in your home or workplace, you know how frustrating they can be. In this article, we’ll explore what drain flies are, their behavior, and the factors that attract them. We’ll also discuss various methods for getting rid of drain flies, including eco-friendly options and the use of insecticides. Whether you’re dealing with a minor annoyance or a full-blown infestation, this guide will provide you with valuable insights and practical solutions to effectively manage drain flies and restore peace to your surroundings.

Drain Flies Removal and Prevention 1

What are Drain Flies?

Drain flies, scientifically known as Psychodidae, are small insects that belong to the family Psychodidae. They are commonly found in damp and moist areas, particularly in and around drains, sewers, and other plumbing systems. These flies are often mistaken for fruit flies or gnats due to their small size and similar appearance.

Drain flies have a distinctive appearance with a fuzzy body and long, hairy wings that are held in a roof-like position when at rest. They typically measure between 2 to 5 millimeters in length. The most common species of drain flies are gray or brown in color, although they can also be black or tan.

Behavior and Health Concerns of Drain Flies

Drain flies are most active during the evening and nighttime hours and have a fluttering flight pattern. Despite their small size, they can become a nuisance when present in large numbers. These insects are attracted to areas with moisture and organic matter, making drains, sink pipes, sewer lines, and septic tanks their common habitats. Drain flies lay their eggs in the organic material that accumulates within drains and pipes, providing an ideal environment for their larvae to develop.

The larvae of drain flies, also known as “moth worms” or “drain worms,” feed on the organic matter found in drains. They have a slender, worm-like appearance and are typically gray or black in color. The larvae go through multiple stages of development before they pupate and eventually emerge as adult drain flies.

While drain flies themselves are not known to transmit diseases to humans, their presence can indicate underlying issues with sanitation or plumbing. They are primarily a nuisance rather than a direct health threat. However, their presence can cause distress and annoyance, especially if they infest living areas or contaminate food.

It is important to note that the organic material present in drains and pipes, which serves as a breeding ground for drain flies, may harbor bacteria or other pathogens. If the drains or plumbing systems are heavily contaminated with organic matter, it is possible for these pathogens to be released when disturbed or disrupted, posing a potential health risk. Therefore, it is crucial to maintain good sanitation practices, regularly clean drains, and address any plumbing issues to minimize the conditions that attract drain flies and reduce the associated health concerns.

Prevention and Control

Drain flies are attracted to stagnant water and organic material, making drains and plumbing fixtures prime breeding grounds for these pests. By understanding the causes of drain fly infestations and implementing preventive measures such as regular cleaning, eliminating standing water, and proper maintenance of plumbing systems, you can effectively reduce the risk of drain fly problems and maintain a pest-free environment.

  1. Regular cleaning: Maintaining proper cleanliness and hygiene in drains, pipes, and other plumbing fixtures is essential. Regularly clean drains using a drain cleaner or a mixture of baking soda and vinegar to remove any organic buildup that can attract drain flies.
  2. Eliminate standing water: Ensure that there are no areas of standing water in and around your property. Fix any leaks or plumbing issues promptly, and regularly check for clogged drains. Proper drainage and ventilation in bathrooms, kitchens, and basements are important to prevent the accumulation of excess moisture.
  3. Drain covers and screens: Installing drain covers or screens over drains can help prevent drain flies from entering your home. These covers prevent debris and organic matter from accumulating in the drains and provide an additional barrier against drain fly infestations.
  4. Regular maintenance: Schedule regular inspections and maintenance of your plumbing system to detect and fix any leaks or issues that can contribute to drain fly problems. Consider hiring a professional plumber to conduct thorough checks and ensure optimal functioning of your drains and pipes.

Can I use Bleach on Drain Flies?

Bleach can be effective in killing some drain fly larvae that come into direct contact with it. However, bleach has limited effectiveness in eliminating drain flies completely. This is because bleach typically passes quickly down the drain and does not penetrate the thick organic buildup where drain fly eggs are deposited and larvae reside.

Drain flies tend to lay their eggs in the slimy organic material that accumulates on the sides of drains and pipes. The eggs and larvae are protected within this organic buildup, making it difficult for bleach to reach and eradicate them completely. While bleach might temporarily reduce the number of drain flies by killing some larvae, it is not a comprehensive solution for eliminating drain fly infestations.

To effectively eliminate drain flies, it is important to focus on thorough cleaning, removal of organic matter, and addressing the root cause of the infestation. Regular cleaning, the use of drain cleaners or biological treatments, and fixing any plumbing issues will be more effective in eliminating drain flies and preventing their return.

Insecticide-Free Solutions for Drain Flies Control

We have found several types of environmentally friendly products that can be used as an alternative to chemical insecticides to control drain flies.

Bio-Enzyme Drain Cleaners

Bio-enzyme drain cleaners are non-toxic and use natural enzymes and bacteria to break down organic matter in drains. They effectively eliminate the food source for drain flies, preventing their breeding and infestation. Look for bio-enzyme drain cleaners that are specifically labeled as eco-friendly or biodegradable.

Garbage Disposal Cleaner and Deodorizer – Green Enzyme Drain Cleaner

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Product Description

The Garbage Disposal Cleaner and Deodorizer uses advanced technology to create a bio-film that prevents grease, oil, and fat from adhering to your pipes. Its advanced molecular odor control technology combines natural free-enzymes that link to foul odor atoms, changing their molecular composition. The result? The smell is no longer detectable by the human nose. Our natural plant-based detergents then scrub and freshen up your drain, leaving behind a pleasant, odor-free sink.

This high-potency odor eliminator can be used for up to 16 treatments. Regular use of our drain smell eliminator prevents future kitchen sink odors and keeps your drains clean and clear without harsh chemicals. The container is also recyclable, reducing our environmental impact.

The Garbage Disposal Cleaner and Deodorizer is acid-free and septic safe, so you can confidently use it without harming the gaskets in your pipes. We are certified by Terra Care Seal, meeting environmental safety standards. It’s a greener and safer liquid drain cleaner that actually works.

Essential Oil Repellents

Certain essential oils have insect-repellent properties and can help deter drain flies. Peppermint oil, tea tree oil, and citrus-based oils are known to be effective in repelling insects. Dilute a few drops of the chosen essential oil in water and spray the solution around drains, sinks, and other potential entry points to discourage drain flies.

Sticky Traps

Sticky traps are non-toxic and can be placed near drains or areas where drain flies are commonly seen. These traps use a sticky adhesive surface to catch and trap adult drain flies. While sticky traps do not eliminate the source of the problem, they can help reduce the adult population and monitor the effectiveness of other control methods.

Organic Drain Gel

Organic drain gels are natural, eco-friendly alternatives to chemical-based drain cleaners. These gels contain natural enzymes or bacteria that digest organic matter, eliminating the food source for drain flies. Organic drain gels are typically safe for use in septic systems and do not harm the environment.

Green Gobbler Fruit Fly Goodbye Gel Drain Treatment 

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Product Description

The Green Gobbler Fruit Fly Goodbye Gel Drain Treatment eliminates fruit flies, drain flies, and sewer flies from your drains. This powerful gel formula is designed to target and eradicate flies that take up residence in the hidden spaces of your pipes. The gel traps and kills flies, preventing infestations from spreading and causing further frustration. It’s a simple and effective solution for tackling these persistent pests.

The formula is non-caustic and non-corrosive, ensuring that it won’t harm your pipes, drains, garbage disposals, or septic systems. You can use it with peace of mind, knowing that it will effectively eliminate flies without causing any damage.

The secret to Fruit Fly Goodbye’s effectiveness lies in its citronella-based gel. This thick gel product is made from natural fly-killing ingredients, with citronella leading the charge. It clings to the inside of your pipes, coating fruit and drain flies and eliminating them with ease. The powerful action of the gel ensures that the flies are not only trapped but also eradicated, leaving your drains fly-free.

Using Fruit Fly Goodbye is a breeze. Simply apply approximately 8 ounces (1 cup) of the gel into the drain during times of least usage. Make sure to cover all sides of the drain, allowing the gel to coat and cling to the walls of the pipes. Repeat the application daily until you achieve the desired results.

Insecticides for Killing Drain Flies

Insecticides can be effective in killing drain flies when used properly and in combination with other control measures. They are designed to target and eliminate adult flies, larvae, or both. However, it’s important to note that insecticides alone may not provide a long-term solution unless the underlying breeding and sanitation issues are addressed.

Active Ingredients in Insecticides for Drain Flies: Different insecticides may contain various active ingredients that determine their effectiveness and mode of action. Here are some common active ingredients found in insecticides used for killing drain flies:


Pyrethroids, such as permethrin or cypermethrin, are synthetic versions of pyrethrins, which are derived from chrysanthemum flowers. Pyrethroids work by affecting the nervous system of insects, causing paralysis and eventual death. They are commonly used in aerosol sprays or residual insecticides for surface treatments.

Southern Ag 10401 Natural Pyrethrin Concentrate

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Product Description

Natural Pyrethrin Concentrate is an organic insecticide derived from a relative of the chrysanthemum plant. This powerful concentrate is designed to effectively control a wide range of insects, providing you with a natural and environmentally friendly solution. It can be used to control insects on vegetables, ornamentals, indoors, and even on livestock. This means you can protect your garden, plants, and animals from pests without the use of harsh chemicals.

Containing 0.96% Pyrethrins and 9.6% Piperonyl Butoxide, our concentrate offers a potent combination to combat pests effectively. Piperonyl Butoxide enhances the effectiveness of Pyrethrins, providing you with a powerful solution to tackle insect infestations. You can use the Natural Pyrethrin Concentrate on a wide range of applications. It is suitable for use on vegetables, ornamentals, livestock, pets, households, barns, and even as a space spray to control mosquitoes outdoors. This versatility ensures that you can protect various areas and organisms from different types of pests. In households and other areas, it combats pests like ants, roaches, silverfish, spiders, and many others. Additionally, it can be used as a space spray to control mosquitoes, flies, wasps, and other flying insects.

To use the concentrate, simply follow the recommended rates and application methods provided on the label. For vegetables and ornamentals, the recommended rate is 2/3 – 2 teaspoons per gallon of water. The label provides detailed instructions for surface spray, space spray, mosquito control, and livestock rates, ensuring proper application for each specific use.

Biological Larvicides

Biological larvicides, such as Bacillus thuringiensis var. israelensis (Bti), contain naturally occurring bacteria that specifically target mosquito and fly larvae, including drain fly larvae. These bacteria produce toxins that disrupt the digestive system of the larvae, leading to their death. Biological larvicides are often used in standing water or drain treatments to control the larvae.

Insect Growth Regulators (IGRs)

Insect growth regulators, such as methoprene or pyriproxyfen, are chemicals that disrupt the normal development and reproduction of insects. They interfere with the growth or molting processes of drain fly larvae, preventing them from reaching maturity or reproducing effectively. IGRs can be effective in reducing the drain fly population by targeting the larvae.

ZOECON Gentrol Complete Broad Spectrum Insecticide

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Product Description

The Gentrol Complete Broad Spectrum Insecticide is a powerful solution designed to break the life cycle of pests such as cockroaches, fruit flies, drain flies, ants, pantry pests, spiders, and more. This convenient aerosol combines an insect growth regulator (IGR) and an insecticide to provide comprehensive control and prevent future infestations. The combination of the IGR and the insecticide delivers knockdown and kill action, ensuring immediate results. Additionally, the residual control provided by this product helps prevent pests from reinfesting your space, giving you long-lasting protection.

The active ingredients in Gentrol Complete are (S)-Hydroprene at 0.36% and Lambda-Cyhalothrin at 0.05%. (S)-Hydroprene acts as the IGR, disrupting the insect life cycle and preventing rebound infestations. This means that it not only eliminates existing pests but also stops them from reproducing, providing you with lasting control. Lambda-Cyhalothrin acts as the adulticide, delivering fast-acting knockdown and kill action against a wide range of pests.

One of the significant benefits of Gentrol Complete is its approval for use in sensitive treatment areas, including food handling establishments. This makes it a versatile solution that can be used safely in various environments without compromising on efficacy. You can confidently apply it in sensitive areas, knowing that it meets the necessary standards for safety and effectiveness.

To further enhance the user experience, the spray head of Gentrol Complete has been redesigned. The new design includes a heavy swivel-type tube, addressing any previous issues and providing a hassle-free application process. The manufacturer has taken customer feedback into account and improved the product accordingly.

Foam and Gel Insecticides

Foam or gel insecticides designed specifically for drain fly control often contain a combination of ingredients, including surfactants and solvents. These products are formulated to cling to the sides of drains and pipes, allowing the active ingredients to come into direct contact with drain fly larvae and adults, effectively killing them.

In Conclusion

Dealing with drain flies can be a frustrating and bothersome task, but understanding their behavior and taking appropriate measures can help effectively control and eliminate these pests. Stagnant pools of water and organic material in drains provide an attractive breeding ground for drain flies, making regular cleaning and maintenance essential.

Various methods can be employed to tackle drain flies, ranging from eco-friendly approaches to the use of insecticides. Eco-friendly options, such as bio gels, repellents, and natural solutions, provide effective alternatives without the use of harmful chemicals. These products target the source of the problem and work to eliminate drain flies and their larvae. Insecticides, on the other hand, can be used for more severe infestations or as a last resort. When using insecticides, it is crucial to choose products specifically formulated for drain flies and follow the instructions carefully to ensure their safe and effective use.

By adopting a proactive and holistic approach, including proper maintenance, eco-friendly solutions, and targeted treatments when necessary, you can successfully combat drain flies and enjoy a clean, fly-free environment.