The RO system is for getting pure water or ultra-pure water from tap,river, ... , and viruses into the RO membrane, The accuracy is 5um, for holding back any large particulates such as large iron, dust ... to RO membrane, at least 1.0 Mpa6. RO system--RO system is the heart part of pure water plant. The RO ... % of B. simply operation and life span ultra pure water system