Weight with line. The weight hangs from the sump switch to automatically turn off the system when the fluid is low. This will protect the pump from running dry.
I tried several things to get rid of the flies, but nothing worked. I installed my Shoo-Fly system last year and have had no more fly problems ! I was shocked at how fast it worked.
Caryn Henry Barrel Horses - Deleon Springs, Fl 32130