[MikeSid]

I just did this last month. I went to an irrigation wholesaler for my stuff, but Home Depot has most of the same stuff.

It's simple. Spray heads on PVC lines. Lines to valves on a manifold. Valves controlled by controller(timer). From manifold, a single line goes to a doublecheck and then to your main line.

"Irritrol" valves were recommended to me and HD didn't carry those. HD also didn't have a brass double check. You'll need a double check to keep contaminents out of your potable water supply.

I used poly pipe to the manifold and copper the rest of the way...but if I had it to do over again, I'd use PVC instead of poly.

Mikester is right about water pressure. Determine what your pressure is and make sure you don't put too many heads on the same circuit. You'll also want to have different circuits for beds and lawns since they have different watering needs.

Spray head should provide double coverage for lawn areas, so map out the arc of each head and make sure you overlap at least twice.

oh...and the double check has fittings to blow out the lines (as well as blow out each section of the double check).

Digging is back breaking work....but it's certainly not mentally taxing.