What are drain gnats?

Answer by  earthlink (120)

Drain Gnats belong to the Insect family Diptera and are actually flys. They are drawn to stagnant water and may travel some distance to find it; such as the appearance of them in a suburban home in a desert. They are actually harmless; their Larvae live in the water of a drain and live on "scum" on the pipes.

Answer by  rbiales (3441)

Drain gnats are gnats that live in a drain. Most of the time they are simply common gnats that have set up housekeeping there and not a special breed. They can be removed by removing their living space in the crud in the elbow of the drain. They can't live on bare steel and water.