Hello All
I have a tank on a hill that is approximately 208ft higher than the pump. I have a poly pipe running down the hill that starts out at 1 1/2" and reduces in size until it gets to 1" OD and I get 90-95psi at the bottom and a flow rate of 12gpm. The distance from the pump to the tank is 1050ft. I want to use a piston pump with a flow rate of 8.5 gpm. The ports on the piston pump are 1 1/4". Should I use 1" pipe for the run back up the hill or larger pipe.

Regards

Phil