Photo Album: Drain Flies Found Throughout Basement in Carteret, NJ I found a large number of drain flies in the basement of this home in Carteret, NJ. Flying Around I noticed a few drain flies flying around the basement. By the Window Continuing my inspection, I noticed a high activity of drain flies hovering by a basement window. So I decided to remove the window... Poured Out and the drain flies started pouring out! This was where the main source of the infestation was located. Treatment for Drain Flies I flushed the area with a knockdown application, which will neutralize the drain flies almost immediately. Bait Them Lastly, I applied a fly bait product around the high infestation areas to eliminate any active drain flies. Related content Case Study: Drain Flies in Apartment - Fly Removal and Control Inselin, NJ Press Release: Prevention Tips For a Pest-Free Pantry This Holiday Season