Flies & gnats
Drain flies: identification & drain fly control
Also known as: moth flies, sewer gnats, filter flies
Drain flies breed in the organic film inside drain lines and floor drains. We identify the active drains, apply enzymatic cleaners that digest the film and treat harborage around the fixtures.

How to identify drain flies
- What it looks like
- Small fuzzy gray-brown flies with rounded, moth-like wings held roof-like over the body.
- Size
- 1/8 inch
- Where you'll find it
- Sink and floor drains, showers, sewer lines, septic and grease traps.
- Commonly confused with
- Fruit flies are smooth-bodied with red eyes.
Signs of drain flies in your home
- Flies resting on bathroom walls
- Activity increasing at night
- Flies appearing after a drain sits unused
Drain flies questions homeowners ask
How do I find which drain has flies?
Tape a clear cup or plastic over each drain overnight — the drain with flies stuck to the tape is the breeding site.
Drain fly control by city
Local technicians handle drain flies in every market below — pick your city for neighborhood coverage, seasonal notes and a free quote.
Drain fly control in Austin, TXDrain fly control in Boise, IDDrain fly control in Charlotte, NCDrain fly control in Charlotte, NCDrain fly control in Colorado Springs, CODrain fly control in Columbus, OHDrain fly control in Columbus, OHDrain fly control in Greensboro, NCDrain fly control in Indianapolis, INDrain fly control in Jacksonville, FLDrain fly control in Kansas City, MODrain fly control in Louisville, KYDrain fly control in Memphis, TNDrain fly control in Miami, FLDrain fly control in Nashville, TNDrain fly control in Oklahoma City, OKDrain fly control in Omaha, NEDrain fly control in Phoenix, AZDrain fly control in Raleigh, NCDrain fly control in Richmond, VADrain fly control in San Antonio, TXDrain fly control in Tulsa, OK