Why do sewer insects appear in the house and flies are seen coming from the drains?

Sewer bugs and small flies emerging from floor drains or sinks are a clear sign that the problem lies not in the air, but in the pipes and damp structures . Many residents try to deal with this situation superficially, but the bugs quickly return.

It is important to understand that this is not a random phenomenon , but a hygiene problem.

What are sewer insects?

Most often it is:

  • sewer flies (Psychodidae),

  • small black insects,

  • moisture insects,

  • tails breeding in pipes.

They feed on organic sediment that accumulates on the walls of sewers.

Why do they appear?

1. Contaminated siphons and pipes

Fat, food debris, hair and biological waste form an excellent environment for insect larvae.

2. Rarely used stairs

If the drain is not used, the water lock dries up and insects freely enter the premises.

3. Moisture under the floor

If moisture accumulates under tiles or concrete, insects can breed not only in pipes but also in structures.

4. Old or damaged piping

Cracks and micro-cracks form additional breeding areas.

How to recognize the problem?

  • Flies appear in the mornings or evenings.

  • Insects emerge precisely from cracks or shells.

  • There is a damp, sewer smell.

  • The problem persists even after cleaning.

Why don't household remedies help?

Boiling water or chemical cleaners:

  • only kills adult insects,

  • does not reach the larvae ,

  • bio-films on pipe walls do not work.

Therefore, after a few days, the insects return.

Effective solution with Dezis.lt

Dezis.lt specialists:

  • performs deep sewer disinfection ,

  • destroys larvae and bio-organic medium,

  • disinfects cracks and pipelines,

  • removes odors,

  • provides preventive recommendations.

This allows the problem to be solved permanently , not temporarily.

How to avoid recurrence?

  • Use all the critters regularly.

  • Periodically carry out preventive disinfection.

  • Monitor the humidity level indoors.

  • Timely repair of pipeline faults.

Conclusion

Insects from the sewer are a clear signal of biological contamination.
Ignoring the problem will only worsen and spread to other rooms.

Dezis.lt helps eliminate not the consequences, but the real cause - safely, professionally and for the long term.
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