So this is for my personal lawn and to save time. I have terriable sandy soil and its a pita to keep watered so I want to install an irrigation system. Nothing fancy, no timer just direct line to the hose. I have an assload of 3/4 inch pvc pipe. I found some cheapo heads for like $15 a peice at one of my local stores. (dont know the names of them) Basically what im planning on doing is running a few different zones and getting one of the splitter ends with valvles to hook up to my water so i can run one zone at a time. The heads i was looking at say they go 10-15 feet each. Therefore i would need a head minimum 10 feet apart. How many heads can I fit on each line before I loose enough pressure in the last head to have it no operate correctly? I belive the size of line to the head was 1/2 inch, so i would be cutting the 3/4 down to 1/2 at the head. Any help would be appreciated.