Drain Flies
Drain flies are small fuzzy flies that develop in organic buildup inside drains, floor sinks, grease traps, mop sinks, and damp plumbing areas. They are especially common in kitchens, bathrooms, bars, restaurants, and laundry areas.
Adult drain flies are usually a sign that larvae are feeding in slimy buildup somewhere nearby.
Early drain fly control starts with cleaning the source, but sprays alone rarely work because the larvae remain protected inside drains or wet organic material.
What Drain Flies Look Like
Drain flies are tiny, moth-like flies with fuzzy bodies and broad wings. They often rest on walls near sinks, drains, or damp areas.
Key identifying features include:
- Small fuzzy body
- Broad wings held roof-like over the body
- Weak, short flights
- Often found near drains, sinks, or wet floors
- Activity that returns after drains are used
Behavior and Hiding Habits
Drain flies breed in wet organic buildup. Adults may be visible, but the source is usually hidden inside plumbing or damp debris.
Common source areas include:
- Sink and shower drains
- Floor drains and floor sinks
- Grease traps and beverage areas
- Mop buckets and damp cleaning tools
- Leaky pipes, wet grout, and standing water
Signs of a Drain Fly Infestation
- Tiny fuzzy flies resting on walls or tile
- Activity near sinks, showers, or floor drains
- Flies returning after aerosol sprays
- Odors or buildup in drains
- Increased activity in kitchens, bars, or bathrooms
Drain flies usually keep coming back until the breeding material is removed or treated.
Drain Fly FAQs
Are drain flies dangerous?
Why do drain flies keep coming back?
Can I get rid of drain flies myself?
Do drain flies come from sewage?
Where should I check first?
Get Your Free Bed Bug Treatment Quote
Drain fly control depends on finding the breeding source. Our technicians inspect drains and moisture zones, then recommend targeted cleaning, treatment, and prevention steps.
Request your free drain fly control quote today.
Why Drain Flies Are a Problem
- Source based: Adults return until breeding material is addressed
- Sanitation concern: Activity often points to organic buildup
- Commercial impact: Flies around food areas can worry customers and staff
- Hidden breeding: Larvae may be inside drains or wet voids
- Spray resistance: Aerosols only kill exposed adults
How to Get Rid of Drain Flies
What You Can Do First:
- Scrub drains with a stiff brush where reachable
- Clean strainers, sink overflows, and floor drain covers
- Remove wet debris and standing water
- Fix leaks and dry damp areas
- Avoid relying on aerosol sprays alone
DIY cleaning helps, but hidden organic buildup can keep producing new flies.
Professional Treatment (Recommended):
Professional drain fly service focuses on source identification, drain treatment, sanitation guidance, and moisture correction.
Prevention Tips
- Keep drains and floor sinks clean
- Flush low-use drains regularly
- Repair leaks quickly
- Clean under mats, equipment, and beverage stations
- Schedule service if flies keep returning
When to Call a Professional
If drain flies keep returning after cleaning, the source may be hidden deeper in drains, wet flooring, or plumbing voids.
Our team can inspect the likely source areas and provide targeted treatment recommendations.
