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It is difficult to do a picture-perfect design on an irregularly shaped property. No head in the middle of the lawn? You have a dry spot in the making. A crafty veteran would move head #8 from its current location to one where it could do a larger half-circle, and cover the center of the lawn.
Make your system connection, then measure the flow and pressure it provides. Only then will you know if your design is correct.
Frankly, with the 'requirement' that there be no heads in the middle of the lawn, I would not use MP Rotators.
This post has been edited 1 times, last edit by "andy69" (Nov 13th 2009, 10:02am)