What You Should Know About Drain Flies

If you've ever had a small fly annoy you in the shower, you've met Clogmia albipunctata. It's a species of drain fly bigger than a fruit fly and smaller than a house fly. You might have wondered where that fly came from, and that would be your drain.

Redditor daisy_bare took the cover off a basement drain and found a writhing mass of drain fly larvae. Before the mass was identified, suggestions included welding the cover back on and burning the house down. While the fly stage of Clogmia albipunctata is generally harmless and several people described the insect as "cute," you really don't want flies in your home. The adult flies are rather waterproof and don't live long, but their main purpose is to lay eggs in your drains, where the larvae can live off the gunk that lines your pipes. The ways to get rid of eggs or larvae in the drains are to 1. pour boiling water down the drain, 2. pour baking soda and vinegar into the drain (that can be dramatic), 3. use a drain cleaning product, or 4. scrub your drains or, if all else fails, call a professional to clean them.

Outside of your home, drain flies are quite useful in treating sewage. I am tickled with the taxonomic name, and had to go check the genus Clogmia to see if there is a species named Clogmia pipe. Alas, there is no such bug.  

(Image credit: Jerzystrzelecki)


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