About Drain Flies (Family Psychodidae)

Activity: Persistent Bathroom & Kitchen Nuisance

Drain flies, also known as moth flies or sewer flies, are small, fuzzy insects that thrive in moist, organic-rich environments. Most active during the evening and nighttime, they are commonly seen hovering near sinks, showers, floor drains, and toilets. While they are weak fliers and do not bite, their presence can be a persistent nuisance, especially when populations grow indoors.

Diet: What Drain Flies Eat & Why It Matters

Drain flies feed on the organic matter and biofilm that accumulates inside drains, sewers, and other moist areas. Their larvae thrive in:

• Sludge and gunk lining drain pipes

• Decomposing organic debris

• Sewage seepage and wet garbage
  Though they don’t directly contaminate food, a significant infestation indicates unsanitary conditions, contributing to poor indoor hygiene.

Size: Tiny But Noticeable

• Drain flies are very small, typically 1.5 mm to 5 mm in length

• They have broad, fuzzy wings covered in scales, giving them a moth-like appearance

• Their slow, erratic flight patterns make them easy to spot near drains and damp areas

Nesting Habits: Where Drain Flies Breed

Drain flies lay their eggs in moist, decaying organic matter. Common breeding sites include:

• Bathroom and kitchen drains

• Shower pans and floor drains

• Under-sink plumbing leaks

• Sewage backups and sump pits

• Overwatered potted plants (in moist soil)
  Regular buildup of organic debris creates ideal conditions for rapid reproduction.

Why Professional Treatment Is Crucial

While DIY drain cleaners and insect sprays may kill adult flies temporarily, they rarely eliminate the root cause: larvae breeding in hidden organic sludge. Professional pest control:

• Locates and removes breeding sites

• Uses specialized treatments to clean and sanitize drains

• Addresses plumbing leaks and moisture problems
  This comprehensive approach ensures long-term eradication and prevents recurring infestations.

Signs of a Drain Fly Infestation

Key indicators include:

• Small fuzzy flies hovering near sinks, showers, and drains

• Recurring fly presence despite cleaning

• Slow-draining sinks or noticeable drain odors

• Larvae sightings (small, worm-like creatures in drain overflow areas)

• Moisture issues or plumbing leaks nearby

Understanding the Problem: Drain Fly Infestations

Drain flies reproduce quickly under the right conditions, leading to constant sightings. They are often a sign of:

• Neglected drain maintenance

• Plumbing problems (leaks, backups)

• Poor sanitation in hidden areas
  Without addressing these underlying factors, infestations will persist. Over-the-counter sprays only reduce adult populations temporarily, failing to eliminate larvae and breeding grounds.

Our Professional Approach to Drain Fly Control

 Thorough Inspection

We identify all active and potential breeding sites, including hidden plumbing issues and organic buildup.

 Comprehensive Drain Treatment

Specialized cleaning agents and bio-enzymatic treatments to remove organic debris and biofilm.

 Moisture & Sanitation Solutions

We address leaks, standing water, and humidity problems to eliminate favorable conditions.

 Long-Term Prevention

Our team ensures infestations are fully resolved with preventative recommendations for future maintenance.