Sewer flies are also called drain flies. To get rid of them you have to first clean the drain. Use a pipe brush to do this. Follow the cleaning by pouring some gel drain cleaner down the drain.
Lime
How to Get Rid of Crane Flies
How to Get Rid of Crane Flies
Pump it into the sewer or just run it into the garden.
Shad flies can be rid of using a common insect repellent. If you an find their nest, you can use an insecticide.
Heck no as it is a very carcinogenic mixture
Hover flies are attracted to bright colors. To get rid of them, you could consider using a Rentokil Fly Killer pen.
A sewer system is the sewer or the sysyem of the sewer.
Use an insecticide.
It flicks its tail around.
swat them with a fly swatter