Hi you guys, I am working on a irrigation system for my church. If we could afford to hire an irrigation company to do the install then it would have been done but we just dont have the kind of funds to do that. So, the source is a DEEP well, I believe it is a few hundred feet down and has an inline pump. Not sure how much water it flows, going to see if I can get any literature on it tomorrow but it probably flows an amount comparable to two residential pumps, maybe more and still has lots of pressure. Now for the question. We are using 1'' mainline over a run of about 450 feet. The mainline doesnt split off into a smaller 3/4 line or the like. Instead we have 1'' T's with 3/4 threads on them for rotors. What I need to know is how much pressure can I expect to lose over such a long run? Is the mainline going to be big enough at 1''? Thanks.