Drain Fly
Psychodidae
Small moth-like flies commonly found in Singapore bathrooms, kitchens, and commercial premises. Their presence indicates organic buildup in drainage systems and is often a sign of underlying plumbing issues.
Risk Level
Medium
Active Period
Year-round, more prevalent in humid conditions
Common Locations
Floor drains, Bathroom drains
Size
2–5mm body length
How to Identify Drain Fly
Physical Appearance
Small moth-like body covered in tiny hairs giving a fuzzy appearance. Broad leaf-shaped wings held tent-like over the body. Grey to brownish colour.
Size
2–5mm body length
Common Locations
Floor drains, Bathroom drains, Kitchen sinks, Grease traps
Habitat & Behaviour
Activity & Breeding
Breeds in the organic slime layer inside drains, pipes, and grease traps. Poor fliers that tend to make short hopping flights. Often rest on walls near breeding sites.
Active Period
Year-round, more prevalent in humid conditions
Signs of Drain Fly Infestation
Health & Property Risks
Prevention Tips
Frequently Asked Questions
Other Fly Species
Need Help With Drain Fly?
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