I'm trying to trouble shoot and figure out a plan of attack for my sprinkler system. I live on a decently sized plot of land (.7 acres) with county irrigation. My yard slopes up from the South to the North with the main line feeding in at the bottom (south end) of the property. I have two zones that are fed form a single valve that is connected to my timer/controller, I can manually switch between the two lines at an additional valve box up north on my property, or I can have them both on if I s...