This Krystal Clear sand filter pump is compatible with the following pool models: Ultra XTR Frame round pools 732 cm og Ultra XTR Rectangular Frame pools 975 x 488 cm The sand filter pump has a flow rate of 10,599 litres an hour and the Krystal Clear system a flowrate of 8,138 litres an hour. The sand provides excellent water filtration as the 6-function control valve allows the pool owner to filter, backwash and rinse, recirculate, drain and close the system. Sand filters are one of the most popular ways to keep pool water clean. Not only is it effective, it saves cost and time since the sand needs replacement just once every 5 years.