Common Questions About Drain Flies

Learn All About These Small Pests

Do drain flies bite?

Drain flies, also known as moth flies, do not bite humans. They are common in areas with standing water and organic waste buildup. These flies do not have any history of passing diseases to humans. Several natural DIY treatments are available that can help control, treat and sanitize areas where they live.

Do drain flies make you sick?

Drain flies are not known to bite or transmit any diseases to humans. However they can trigger bronchial asthma in susceptible individuals.

Are drain flies harmful?

Drain flies are not dangerous to humans or cause structural damage, but they become a nuisance in large quantities. Even though these pests eat sewage, they are not known to transmit any harmful bacteria. There have been some instances where asthma as been triggered by people who inhaled drain fly body parts.

Will Drano kill drain flies?

Drano by itself will not eradicate drain flies, although it can be used in the process of cleaning out pipes from buildup and scum.

How long do drain flies live?

Adult drain flies usually live about two weeks. New emerging adults will quickly replace dying flies.

What do drain flies look like?

Drain flies are small and brown or black in color. Their wings look heart shaped at rest, and hey usually fly in short hops.


Can drain flies live in houseplants?

Yes. Drain flies will be attracted to areas with standing water and/or organic material off which to feed. Cut down on watering plants or remove them from the premises.

Can drain fly larva swim?

Drain fly larva do wriggle or “swim” in water or scum.