I'm reading this thread and all the while I'm thinking, "What is the attraction of a sump?"

        A sump seems like a lot of trouble when you have a return fuel system. It seems to multiply your fuel management headaches. There seem to be a lot of ways it can run dry with little warning. It seems like more seams to leak and another place to collect water.

        Why pick a sump over Tracy's time-tested transfer system? If you don't like that system, why not gang up two 3-way valves and simply select one tank or the other?

        With all the trouble sump systems have been proven to cause, why even go there?

        Maybe I'm missing some key point.......

        Bill Dube'