Your hopper tank should have a rigid pickup tube located in the geographical center of the tank, with no clunk. That way, the pickup tube is always submerged ion fuel.
No chance for air to get inhaled.
The hopper tank stays full, as it draws it's fuel from the main tank clunk line, through the air trap vent.
The BVM UAT uses 6mm feed lines, and I seriously doubt that your engine could draw fuel through that large a diameter.

Harley Condra
BVM REP
JetCat REP