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Why Are Black Flies Coming Through My Bathroom Drain?

Flies Coming Out of Sink: The Hows and Whys

Ever had the creepy experience of flies coming out of your sink? It's an image straight out of a horror movie - you walk into your bathroom or kitchen, only to find a swarm of tiny flies emerging from your sink's drain. But there's a logical (and rather icky) reason behind this unsettling phenomenon. Before you go blaming the supernatural or considering moving out, let's unravel the mystery behind these unwelcome guests.

Why Flies Love Your Sink

What makes your sink so appealing to these tiny pests? Drains offer an ideal environment for certain types of flies to breed and thrive. The moist, dark conditions paired with a buffet of organic matter (like food scraps, hair, and soap) can become a haven for these insects.

Understanding the Drain Fly Invasion

The Culprit: Meet the Drain Fly

When we talk about "flies coming out of sink", the primary culprit is usually the drain fly. Also known by other names like sewer flies, moth flies, or filter flies, these tiny pests are different from the common housefly. Here are some quick facts to help you identify them:

  • Size: Tiny, usually 1.5 to 5 mm in length.
  • Appearance: Light gray or tan in color and have a fuzzy, moth-like appearance.
  • Habitat: They lay their eggs in the organic matter found in drains, hence the name.

Why Your Sink is a Drain Fly Haven

Remember the last time you didn't clean your sink for a week or so? Bits of food, grease, and other organic debris can build up in your pipes. For drain flies, this buildup is like a five-star hotel. Here, they lay their eggs, which then turn into larvae that feed on the gunk in your drains. And voila! Before you know it, you have a drain fly infestation.

Prevention and Solutions

Tired of sharing your home with these pesky flies?
Here's how you can evict them and ensure they don't come back:

  1. Regular Cleaning: Ensure your sink and drain are clean. Regularly flush with boiling water or a mix of baking soda and vinegar to break down the organic buildup.
  2. Use Mesh Screens: Fit your drains with mesh screens. These screens will trap larger debris, preventing buildup and making your sink less appealing to drain flies.
  3. Professional Help: If the infestation is heavy, it might be time to call in the pros. We will conduct a thorough cleaning, use specific treatments to eliminate the flies, and give advice on future prevention.
  4. Seal Cracks and Gaps: Ensure there are no cracks or gaps in your pipes or around your home. Such openings can be entry points for drain flies and other pests.

In Conclusion

The appearance of flies coming out of your sink can be disturbing. However, with the right knowledge and a proactive approach, you can tackle the issue head-on. Regular cleaning, preventing organic buildup, and seeking professional help when needed will keep your drains fly-free. So, the next time you see a tiny winged creature emerging from your drain, you'll know exactly what to do!

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We had an issue in my neighborhood where a water main pipe burst, leaving a giant mess of a leak spewing into the street. We called numerous plumbing companies who all said they couldn't get out in a timely manner. RooterPlus! said no problem, we'll be out asap.Josh came out, assessed the situation and said he had to go get some more supplies. He came back with the necessary supplies and got to work. And he worked and worked and worked from 6pm until 4:30 am! He had to call in reinforcements (Josh 2) and they worked hard as a team to repair the issue. Then they came back out only 5 hours later to put the finishing touches on the job.I think I speak for the entire neighborhood when we say THANK YOU SO VERY MUCH for being absolute rockstars and getting our neighborhood back up and running.


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