This filter pump is a replacement part for Bestway and Flowclear 330 gal. filter pumps, as well as select Fast Set, Steel Pro, Steel Pro MAX and Power Steel above ground pools that come with a 330 gal. filter pump. This pump works its magic by circulating water out of the pool, through a filter cartridge and back again. The complete set includes everything you need to connect the pump to your pool and get the filtration system up and running.