Hello , Been outta town ... just got back . I have 7 zones , each with 4 rotors ( not sure of gpm ) , Also 2 zones , each with 14 pop-ups . I'll contact my irrigation guy tomorrow for more specifics . My well has iron in it . I have a Kinetico system that removes the iron before it comes to my house ... the water that goes to the field does so .. without .. going through the system...ie: the field water has iron in it . How much I don't know ... enough to see it . Thx !! J.D.