SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

What type of water supply do you have? City water? How much water at what pressure? A lot of recommendations you might see will suggest head-to-head spacing, and that may seem excessive, but there is a point. Some curbs and driveways are Belgian block edged, and there is enough of a space between a sprinkler head and the stone, that it is the next head over that covers that space. And if you use a sloppy design, and try to run too many heads at one time, you'll be glad you used conservative spacing. The fact that you quote a spray distance of 37 feet (just try and get that in the daytime while the wind is blowing against you - think sod) for your sprinkler head choice suggests that some conservative thinking is in order.

The simple answer is since you shouldn't mix two different type sprinklers on the same zone, then I guess you also shouldn't overlap zones between different sprinkler heads.

Of course that's a simplistic answer that really only fits if the area you are trying to water is a simple shape. I had previously noticed the question but didn't answer it when I saw it because I felt this answer was overly simplistic. But without a scaled schematic of the area, I can't begin to suggest anything better.

When the "How-To" books show both rotors and spray heads used in the same yard, they always construct the samples such that the two different zones don't attempt to overlap.

Again, don't overlap the zones. At the point of transition, you have a set of RB1800s that spray back towards the house (so that you get two RB1800's overlapping each other like you're supposed to). You also place a set of AG-5 at the transition point, but they don't spray toward the house.