My advice is to use the TORO 570 for spray, thats what i use on my systems, the only thing is you have to by a specific nozzle. The Hunter company is the Leading manufracture in irrigation produces, and make great quality products, but they havent mastered the nozzle spray on their sprays, the toro 570 is way better. To tell you the truth you dont need them on both sides. Just install Toro 570 on one side, close (but not to close) to the sidewalk or neighbors sod, and install 12' (Brown) Half nozzles and install them about 12 feet apart (give or take a little) also put as many heads as you can on the line based on the GPM flow you have and the nozzle. I think that they take up around 1 (not definate) If you are really REALLY concerned about the heads also on the other side, you install them in a triagnular shaped design. EX. If you have one on one side, space the ohter 12' away but on the other side. And so on and so forth. The Hunter Design Manual (www. hunterindusries.com) has some pictures (i think) but really i wouldnt even bother (its not wide enough for you to do that) Hope that helps
IF you need help with anything else you can ask
Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers
Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers