Drain Flies

General Descriptions
About one-eighth of an inch long, adult drain flies are slightly larger than other small filth flies. Their broad, hairy wings have given rise to another name: moth fly. They also have been called sewer flies, because they infest raw sewage. Drain fly adults are often noticed resting on bathroom walls. The larvae survive submerged in the gelatinous muck that accumulates in floor, sink and toilet drains, by extending their breathing tubes to the surface for air.

General Control
To eliminate infestations, drains and traps should be cleaned with a wire brush and/or a bacteria or enzymecontaining drain cleaner.