Pool Filtration System - 12' Sand Filter with 3/4 HP Pump fits for 14x14ft swimming pools 4 Functions - to provide Backwash, Rinse, Filter, Winter for filtering & cleaning water High Efficiency - Flow rate up to 2640 GPH & working pressure up to 51 PSI for fast flowing Durable Construction - made of PP with 30% glass fiber ; Aluminum shell for better rustproofness Easy Assembly - Includes all accessories for installation