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How to Get Rid of Drain Flies


Introduction to Getting Rid of Drain Flies

  • Drain flies (Clogmia albipunctata), also known as sewer gnats, filter flies, or sink flies, are small moth-like insects typically found in and around drains, shallow water, and sewer systems. Their presence can be unsightly and annoying, and their numbers can increase rapidly if not addressed, making them a common household pest.
  • Taking immediate action to eliminate sewer flies is crucial for several reasons: preventing infestations, reducing the spread of human disease, and minimizing allergens.

Understanding Drain Flies

  • Their life cycle begins lay their eggs in the moisture that lines the drainpipes. When the eggs hatch, the larvae food sources usually consist of decaying organic matter. As they mature into pupae and eventually adult flies, emerging adults will come from the drain, infesting bathrooms and kitchens. Their presence can be unsightly and annoying, and their numbers can increase rapidly if not addressed, making them a common household pest.
  • They are a nuisance for homeowners because their breeding areas are moist organic material that accumulates in drains, such as decaying food particles, long hairs, and soap scum.

Identifying Signs of a Drain Fly Infestation

  • The most obvious sign is the presence of small, moth-like flies near sinks, drains, and sewage systems, especially in the bathroom or kitchen. They may emerge from the drain when you run water or use the sink or shower, as the disturbance prompts them to fly out. You might notice clusters of them in certain areas, such as around drains or pipes where there is stagnant water. If you see small, worm-like larvae in or around your drains, it's a clear indication of drain fly breeding. A musty or sewage-like odor coming from the drains can be a sign of drain fly infestations. This odor is often associated with the decomposing organic matter where they lay their eggs.
  • If you see the presence of drain flies, check inside sinks and floor drains for dark, slimy, gelatinous film which serve as breeding grounds for drain flies.

Steps to Prevent Drain Fly Infestations

  • Install drain strainers or screens in sinks, bathtubs, and shower drains to catch hair, food particles, and debris before they enter the drain. Avoid pouring cooking grease or oils down the kitchen sink, as they can solidify in the pipes and attract drain flies. Dispose of them properly in a container. If you have a garbage disposal, use it as intended, and run cold water while it's in use. Periodically grind ice cubes and citrus peels to help clean the disposal. Inspect your plumbing for leaks, as even small drips can create the moist environment drain flies need to breed. Ensure that there is no standing water in drains, as this can provide a breeding ground for drain flies.

Effective Methods for Eliminating Drain Flies

  • The best technique to avoid a Drain Fly infestation is to prevent one from happening in the first place.
  • If you are experiencing an infestation and want to avoid insecticide products you can first try pouring boiling water, bleach or apple cider vinegar into these moist areas described above. You can also try an apple cider vinegar trap or an insect glue board as well.
  • For heavy infestations, or if these home remedies it is time to call out a professional to get rid of the Drain Flies.


  • Drain Flies are a major nuisance to a household and kitchen area, but infestations can be prevented.
  • The quicker you act the easier it will be to eliminate a Drain Fly infestation
  • If you follow the guide above you can assure you will be living in a Drain Fly free household
Hiring a professional to get rid of drain flies
A Professional Pest Control company is sometimes needed to get rid of Drain Flies.

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