... .Imported parts over 90% 2.fully- auto system , auto stop when water is full and ... start 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 , ... 300FRO-334.0753-8≤300 500L semi-automatic RO water purifying system