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The necessary size (or horsepower) of the pump can be determined by the following general rule-for above ground pools up to 24 ft round, use a 1 HP pump and for above ground pools over 24 ft round, use a 1.5 HP pump.
The pool is only 4 ft. deep, but holds less than 5,500 gallons of water â a lot less than the Intex pool featured above. It will also take up less space in your yard, and it features a 1,500-gallon water pump, a must for keeping the water circulating and sanitary. 3) Twice the size equals four times the water. As this chart from Propools.com illustrates, a 15-ft. above-ground pool with a wall height of 52 in. will use 5,065 gallons of water. Expand that size to 30 ft., and youâll use about 20,700 gallons of water, an increase of nearly four times the volume.