Drain Fly
Psychodidae
FliesSmall moth-like fly, about 1/8 inch long, covered with fuzzy hairs. Breeds in the organic slime in drains, sewers, and septic tanks. Also called moth fly or sewer fly. Weak flier often seen on walls near drains.
Control Methods
Recommended methods for controlling this pest
| Method | Type | Effectiveness | Requirements |
|---|---|---|---|
| Drain Gel and Foam Treatment | Chemical | None |
Common Harborage Locations
Where to find this pest during inspections
| Location | Why Found There | Priority |
|---|---|---|
| Behind Toilets | Difficult to clean area, moisture from condensation and leaks, warmth from water supply, protected location. | High |
| Bathtubs & Shower Surrounds | Constant moisture, warmth, gaps in grout and caulking, access to wall voids, poor ventilation. | Medium |
| Floor Drains | Constant moisture, organic matter accumulation, connection to sewer system, warm environment. | High |
Important Disclaimer: The information provided in this knowledge base is for educational and reference purposes only. Pest management professionals should always consult current product labels, Safety Data Sheets (SDS), manufacturer instructions, and applicable local, state, and federal regulations as the definitive source of truth. Product formulations, application methods, safety requirements, and regulations may change over time. This information may be out of date and should not replace professional judgment, proper training, or required licensing and certifications.