Bestway Aquadip Automatic Suction Pool Vacuum for Above Ground Pools Automatic suction cleaner which connects directly to your wall skimmer or vacuum inlet to vacuum pool walls and floor Requires pump of 1500 gph or higher (not included) Suitable for both for hard wall pools and soft wall above ground pools up to 20 ft. Membrane technology ensures silent operation with optimum cleaning efficiency Simple twist-and-lock cassette for easy access to change the diaphragm