This one I'm not too sure about. I think I know but then again I could be wrong so that brings me here. New system just installed 2 zones of 4 rotors each equal 8 gpm. Then I have 2 zones of sprays heads 6 gpm and 6 gpm and the only reason they were spilt was one runs a small garden and the other runs a flower bed both with different watering needs. The 2 spray zones I have the pump relay cycling. Oh the system pressure is 9 gpm with a pressure tank. This well once ran the house water and now is just for the irrigation. Tell me what you guys think thanks again for the help.