My pump 1090 gph has 1/2 inch output pipe. PIPE A is then inserted externally increasing the pipe diameter (maybe 2 mm), After 20 inches, PIPE B is inserted INTO PIPE A, reducing the diameter of the pipe and then it flows into the tank. My plan is to use larger diameter Pipe say 1 inch at the pump to increase the diameter of the pipe being used, now will I get increase GPH while reducing pressure or will just get the same GPH ?