... auto system , auto stop when water is full and auto start when on water . The FRO Automaticly purifying water ... when on water .Auto backwash , IC microcomputer control system ,auto backwash RO film , raw water and well ... .Well water conductivity ≤10Reverse osmosis desalination rate ≥99%,system desalination rate ≥97%, filtrating rate of organic matter ... ≤300 500L semi-automatic RO water purifying system