I have an above-ground pool which, tis the season for draining and winterizing. I have a 15 foot section of ribbed pool hose (designed for pumping) that I hook up to the pump and flush the pool with. Pool is 4 feet deep both inside and outside, with a 1foot lip. Hose needs to rise one foot from water surface over edge to get to intake. I only need about 5 feet to reach from the pool bottom to the intake, and the hose only needs to rise about a foot out of the water. (So my head is 1 foot right?) The other 10 feet of hose I tend to drop into the pool - with the rationale that I'll get better pressure than if it were lying outside on the ground. Is this true? If, instead I left the excess 10 feet of hose outside the pool - i.e. I ran the hose from the bottom of the pool (4 feet up), over the edge (another foot up), then down to the ground (5 feet down) in a heap, then back up to the intake port (5 feet), would that make any difference in efficiency? Head is still one foot (because the only thing that matters is the absolute distance from the surface of the pool to the intake.) Amirite?