I am planning to add a sprinkler system to my wife’s horse arena. I am going to have an 1100 gallon tank for storage. I will be Using an AMT 7.5 hp pump (4803-95) which will pump to 4 rotors(1 rotor on each zone). I want to use Toro TS90 rotors, I believe I can put one on each side of the arena and get adequate coverage at 70psi. I was planning to run 1.5” pvc buried around the edge of the arena, which should give me a little pressure increase and still have enough GPM for the big rotors. The arena is 200x140. I was going to use toro p220 valves to regulate pressure to the rotors. The rise from the pump to the highest rotor is about 18”. Is it better to place the valves closer to the pump or can I get away with placing the valves close to the rotors. If the valves are closer to the pump I have to run more PVC. If they are closer to the rotors I can run less pvc and just have to run more wire. Appreciate any input, I want to do this once and avoid a lot of trial and error.