How high should I place the water tank? I want to have gravity feed with enough pressure without rely on any pump. I know the higher the better but there's a cost to it. I don't want too much pressure. Just enough for a typical home. I guess that's between 40-60 psi??? The highest point on my property is about 150 feet above the house. Found some reference on a google search saying I get a theortical pressure of 43.3psi per 100 feet if there's no friction in the pipe. What's the realistic pressure if I place the tank 100 feet above the house? Thanks for you help.