I have a couple of areas that I need some help in. I am new to the irrigation field this will be my first install.(my own house).I have an area that is 8' wide and 150' long can any one tell me how many heads I will need in this area and how much should I space them apart.I am running Rain Bird pop ups 1800's.My second area is 8' wide and 45 ' long. I will be using county water if that helps.I plan on making these two areas one seperate zone. any information will be helpful. Thanks.