Hey everyone, I have a good customer in a very rural area and cannot find a adequate fairly priced subcontractor to do a sprinkler system for him, so I am taking this on myself. The customer has an existing pump which is a: Wacker PS2 750 he likes the pump a lot, but I am unsure how compatible it is with a irrigation system. See http://www.ishoplandscaping.com/product/Wacker-PS2-750-Electric-Submersible-Water-Pump for the specifications. We are designing a system for a very large area at the entry of the house using Impact heads but I am unsure of which to use for sure - local supplier recommended Rainbird 35A we need about 30'-40' distance and adjustable operation. I have a few questions: 1) How do I know the pump is compatible with a pump start relay ? I can't find anything about this? 2) How many GPM should I use in planning zones (pump states MAX GPM at 73) can I safely use 90% of this? 3) Is 26 PSI that the pump puts out enough to run Rainbird 1800 popups? Or will these clog up using 'dirty water' - what should I use? I have one area 18' x 58' rectangle and a weird right (90degree) triangle with the sides 27x 22 x26. 4) What is the typical installation cost of a pump start relay done correctly that you bid? Any other general advice will be greatly recommended. I am sure this thread will grow over the next few days as I get the details of the project figured out further.