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Thanks for your Reply,Your numbers do not work, if you want economy. With economy first, you give up on 50+ psi in your system, and settle for about 40+ psi. This allows you to apply a simple centrifugal pump as a booster, because those pumps move good volume as long as the boost is 30 psi or so. For instance, a 1.5 HP centrifugal could boost a 50 gpm flow by 35 psi.
The key question, is how many acres are you watering? Flat ground?
For an acre-and-a-half, 50 gpm is overkill, even on sandy soil. 20 gpm would do just fine, which keeps you with standard 1-inch zone valves. This also changes the pump situation. You can use a 1 HP jet pump, which gains more pressure in exchange for delivering less flow.
As for the system drawing, it lacks a scale, so no one on the internet can know exactly what you are looking at. You need to add a line with inch markings.
This post has been edited 3 times, last edit by "4U2NVME" (Jun 10th 2012, 6:50pm)