Next time you refuel from a pump with only one hose, try opening the nozzle before turning on the pump and see how much gas comes out. It will gravity feed from up top where it is connected. Let us know how much comes out.:s
PS....12' above your head???:shock
Also consider the inside diameter of that hose too.
PS....12' above your head???:shock
Also consider the inside diameter of that hose too.