I am installing an irrigation system at my home in FL. My plan is to install (1) backflow 1.25" just as it comes out of the canal (water Source). Then its 100' of pipe to the pump. Do I need seperate backflows for each zone? I will be using Hunter products throughout, and I think some of the higher end rotors have a self contained backflow as well? I can see the reason for the backflow as it comes out of the canal because there is a slight hill as it initially comes out of the canal(25' @ 45 deg...
