You have 300 feet of fall.......you run a pipe 300' straight up from the stream, then back down......and to the bottom end point downhill. We have created a siphon. We will have X pressure at the bottom end. Looks like 130 psi.
But if we break the siphon....we would have 260psi once we only had the pipe filled to the 300' height above the stream?? Because then without the siphon working we have the pressure from the 600' head ??