Pressure is generally controlled by elevation and volume of flow by pipe diameter. I used 1" schedule 40 all the way from our spring down to the cistern at the top of our property, from the cistern to our home is roughly 50' elevation, I don't have the figures handy for elevation to come up with pressures but the pressure I have in the home is 25 psi, the water line from the cistern is also 1" and this pressure and volume has served us well over the years since I built the system. I decided not to use pressure from the spring as it would be far too high due to the elevation but it works great for constant filling of the cistern and the overflow out of the cistern goes down hill to an old bathtub that I keep a number of goldfish in to take care of mosquito larva, from that tub the water overflow goes down to the chicken yard, so nothing is wasted, that water is also used to water fruit and nut trees and a garden. I made all the lines to have at least 1/8" fall per foot so that in extreme freezing there would be no pooling to freeze even when I couldn't bury the line deep enough to meet my standards. The line from the spring to the cistern is just over 500' and when I dug it, I had the only case of poison oak blisters on my legs that I've ever had, the ditches were full of their roots and so I got a lot of their oils as I was digging away.