[Michael C Henry]

I haven't taken my old pumps apart but intend on doing just that.I'll be looking for something foreign that may have blocked the check valves. It seemed sudden that both pumps running became necessary. Maybe one pump while not running was letting some fuel go back to tank.
What about inline check valves?
What about the return line in tank I remember some discussion a long time ago.I did the search but got tired of unrelated stuff.What bout the return inside the tank /High- low ? swirl? just dump it in what is the current thought?I saw where somebody offered a drawing .