Thanks in advance for your replies and assistance. Just to give you a little background, I have done quite a few sprinkler repairs and I have installed additional zones on a system before. My question is whether or not I would be getting in over my head by installing an entire irrigation system in a 2 acre lot. There are a few trees, but not too many. The land is relatively flat with a few small hills. I was thinking it would be an 8 zone system. Water pressure is great. Thanks again.