I have a above ground 18' intex pool. Using a intex SF60110 1 hp pump. Problem: I cannot get suction from the pool while on the bottom for vacuuming. I went so far as to try bypassing the skimmer (old style that came with the pool) and plumb directly to the pump inlet from the vacuum brush, still no suction. I also have the square adapter than fits in the skimmer and then to the vacuum hose and vacuum brush, still no suction. I tried all the position on the valve, still no suction.
OK, what am I doing wrong.