The gnats most likely to occur in sinks and sink drains include fruit flies moth flies and to a lesser degree phorid flies.
Little flies in bathroom sink.
Drain flies aka moth flies can be a common but harmless nuisance.
Wings and body are covered with long hair.
They routinely show up in kitchen or bathrooms where they lay eggs in the gelatinous organic slime that can develop in sink drains.
Before you can rid your home of drain flies you need to identify the affected drains.
Drain flies are small measuring an eighth of an inch which is about the size of a fruit fly or a gnat it s easy to confuse them as a matter of fact.
If you ve been noticing small flies buzzing around the drains in your kitchen or bathroom you may have a drain fly infestation.
Commonly known as drain flies these pesky creatures lay their eggs in the gunk that builds up in the pipes.
While there is some variation surrounding what insects constitutes gnats for our purposes we will address only those small flies that are non biters and are likely to be pests within homes and other structures.
But in commercial settings particularly those that serve food it becomes even more important to keep drain flies under control.
Even those with septic tanks are no stranger to drain flies because of the fact that they need stagnant water in order to successfully breed and create.
Drain flies are a nuisance and the problem only gets worse if they re not taken care of.
Why drain flies like your bathroom.
Finding a swarm of small gnat like creatures flying out of your sink overflow hole can be unsettling.
Fruit flies they are dull yellowish or brownish black in color.
House flies they are gray in color about 4 to 8 mm long with four dark gray stripes on upper body.
Gnats they are about 4 mm long delicate dark colored flies with long legs and antennae.
Drain flies they are about 1 5 to 5 mm long with a light gray or tan body.
These flies are most commonly found in areas where there is standing water which is why they are usually found in your bathtub toilet drain and sink.
Measuring in at just 2 to 5 millimeters about one eighth of an inch drain flies are pesky insects that tend to congregate around standing water.
Commercial restaurants are a haven for sewer flies.
With kitchen drains bathroom drains sinks and grease traps restaurants are a drain fly s paradise.