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Get Rid of Drain Flies

Identify & Treat Infestations

Drain flies lay eggs in a mass of 30 to 100 at a time and hatch in less than 48 hours! Dirty garbage disposal units, standing water, pipe traps in plumbing fixtures, or other locations with organic material buildup are prime areas for infestation.

picture of sewer fly

Got Small Black Flies?

There are many types of small black flies. Drain flies, also known as sink flies, filter flies, or sewer gnats are small “true” flies. These flies can inhabit plumbing drains, sewage systems, and piping. They are generally harmless, but will continue to reproduce unless treated. Expect to find them mainly in bathrooms and kitchens.

What Do They Look Like?

Drain flies, or sewer gnats (Psychodidae) are small black flies with wings that appear heart shaped at rest. They do not move like typical houseflies, rather, they fly in short hops and only for a few feet. Their wings have a fine coat of hairs, which makes them look like small moths. When crushed, drain flies leave behind a powdery residue.

drain fly on wall

Did You Know Drain Flies Are Also Known As Sewer or Moth Flies?

mud splatter and dirty water

Where Do They Come From?

Like their name suggests, drain flies are most commonly found in drains ad damp areas including:

  • bathroom sinks
  • bath/shower drains
  • kitchen sinks
  • plumbing pipe traps
  • sump pits
spray-bottles-for-flies

Treating Drain Flies

It is possible to treat common drain fly infestations at home without calling expensive professionals. The key is to find, control and eliminate their breeding sites. Finding their breeding areas is the first step towards a successful treatment program. See this information above before proceeding.

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