... below 5um/cm.(C).Pure water tank: When the pure water tank is full, the RO machine will ... automatically come to stop, when the pure water tank is empty, the RO system will automatically run ... the pure water.4>Process:Raw water ->Raw water tank -> Raw water pump -> Quartz sand filter -> Active ... pump ->Security filter -> RO equipment->Pure water tank(1) water production basis on water temperature 25°C ...