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Q&A Home

Tammy writes,

I am wondering how to attack my drain fly problem first.

I have drain flies in the kitchen (where I first saw them 3 years ago), and now have them in both bathrooms. I wonder if they are behind the kitchen cabinets, too(?). We had a flood in the kitchen area 4 years ago. Not sure if that's related. Could they spreading to the other drains? We also have a floor drain (our kitchen is on the walk-out basement level) and wonder if I should treat that, too.


All drains in an infested room must be treated. Drain flies can definitely spread from one room to another and drain flies can breed anywhere there is a buildup of moist decaying organic matter as that is all they need to breed. We recommend that you check out our Drain Fly Kit which comes with all of the products we would recommend to treat a drain fly infestation plus it comes with a step by step instruction guide to help you through the process. You can also watch the instructional video on the Drain Fly Kit page on our website (scroll towards the bottom of the page to read our instructional guide). If after following the inspection instructions on our drain fly page you find that the flies are not developing in the drains you may need to find a way to get behind the cabinets and thoroughly clean the area you suspect is infested.

Answer last updated on: 07/04/2011

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