... /500GDPDesalting Rate: 98%Pretreatment: Quartz sand , activated carbon, precision filter.Membrane: RO membraneHigh Pressure Pump:Water Storage Tank: 11 gallonConformable Number: Maximum ... water, supply water, pause by water overfull or lack, automatic RO membrane flushing 2 minutes each hour ,force pretreatment back wash ,etc ...