i purchased directly from inglese. the fuel pumps are in line pumps provided by FAST technologies. I had a two tanks two elect fuel pumps setup before. I wanted the two switches on the dash to control the two new pumps. I simply put the both high pressure lines into a T connection with fuel check valves on both lines. then when the pump is not active the check valve prevents backflow. I also used two electric fuel shut off valves(closed when not energized) on the return lines which also were T'd. when i energize the fuel i open the return line valve. So excess fuel goes back to the tank it came from. I can even turn on both pump and works fine.