Aim is to transmit water from the source to the end point. Option is to use gravity pipeline system (may use tools i.e. pump, air valve, pressure reducer, etc if required!). Problem The following system transmits water from Reservoir A to Reservoir B by means of a gravity pipeline where, L=3500m, f=0.017 and D=0.7m for all pipes. This pipe line has two high points at C and E, where small-orifice ai valves are installed. Assume that the valves require 5m of line pressure head for proper operation. Checking the design specifications [(0.5m/s