Thanks Waste, I'm planning to replumb the whole pad and I'm hoping to plumb it for minimum head. I'm considering things like smooth curve pipe or 45 degree angles. I don't have a backflush valve for the DE filter and I don't plan to bother with one so I should end up with very low head pretty easily. I've got a barracuda that will be on it's own suction port and I'll be plumbing the main drain so I can pump into or out of it. (the baracuda sticks to it if I leave it on suck anyway..;0)