Controlling Drain Flies?

The topic is drain flies. Why don't pesticide companies treat drain flies? New to an area in the south. They left a quart of DF5000. It works to some degree but flies keep creeping in. In the interim I have used Drano and water blend with bleach. I might add that this is a new home. Less than a year. When we moved in there was a blockage in the drain system which was needed to be cleared during the first week of occupancy.





Any advise would be appreciated. Thanks.Controlling Drain Flies?
The bleach should work. By drain flies, do you mean fruit flies or something bigger?





I would not dilute the bleach too much. If that does not work, switch to a RAID type product. I like konk 409. Its an aerosol, but spray it directly down the drain.





If you have a septic tank system, I would check with a plumber as you don't want the draino %26amp; everything reacting to blow up your septic tank.Controlling Drain Flies?
Try keeping the drain closed, with a small amount of water in the tub. This should prevent them from coming out. Just change the water our once a day so it doesn't go stagnant.
Drain flys come from a build up of waste materials coating your pipes, they can also breed in any wet damp place like water under flower pots, or leaking wash machines, etc. They come right through the water in the P trap when they emerge. It only takes 48 hrs from eggs to adult fly.





Putting pesticides into a sewer drain is against federal law and all 50 states laws. The pesticides kill the microbes that digest the waste in septics and municipal sewage plants.





Get rid of all standing, leaking water and damp places, then:





Clean and scrub the pipes often to remove the build up. Then flush the pipes with bleach after each cleaning.





OR: use an organic waste digester that slowly builds up and grows in your pipes. After about a month of applications, it will have grown enough microbes to have eaten all the waste in your pipes and is coating the sides of the pipe. The microbes will keep the pipes clean once they become established. Clean pipes deny the flys breeding places. DF5000 is such a waste digester, it is not a pesticide.





Using bleach after using DF5000 kills the microbes in the DF5000 so stop using bleech and start using bio-degradable cleaners like people in the country with septics do. It takes about a month of treatment for DF5000 to work.





The only other way to reduce the flys is to keep the drains covered when not in use. But when you unplug the drain to use it, they will rush out.