How to clean the swimming pool filter sand and backwash
Turn the lever to BACKWASH. Open the valves to the suction and return lines. Start the pump. Rinse the filter for about 1 to 2 minutes or until the water in the sight glass is clear. NOTE: Any electric heater must be off. Stop the pump. Turn the lever to RINSE, start the pump and rinse for about 15-30 seconds.