My BK is on a cart such that the spigot is about 3.5 feet off the ground.
I run a hose from the spigot to the pump. The pump is oriented perpendicular to the ground, with the "in" on the top and the "out" facing the ground. The pump then forces the wort through my therminator, then through 25' of copper coil sitting in an ice bath before making its way to the fermentor.
What I am wondering is that the 3ft+ drop is more gravity than the pump actually sucking, which is why I don't have problems with clogging on my bazooka T?
Again, if I use over 50% pellets, I do have problems, but not when using whole hops.