I purchased the subject pump to filter the water that collects on my 16 x 32 in ground pool winter cover before sending it into the pool. With the pump sitting on the pool apron, it would not pump the water from the winter cover. My trouble shooting ultimately lead me to place a pail of water next to the pump, place one end of a 4' hose directly to the suction side of the pump (basket housing removed) and the other end into a four gallon pail. I turned the pump on while observing the output side of the pump. It took the pump seven minutes to pump the four gallons from the pail, i.e. 34 gallons per hour. I contacted Intex and they sent me a new pump which pumped no better than the first. Is a .75 HP, 2800 gal/hour above ground pool pump incapable of raising water 20 inches?