... automatic wash and backwash 3.stainless steell Product DescriptionRO Water Purifying Equipment 1. Imported parts over 90% 2 ... 97% USE: Cosmetic, Pharmaceutical, chemical industries, food, drinking water. 5. American RO low pressure film. 6. America Autotrol ... washing 3. Water level sensor system, too much water will stop automatically, Less water will run automatically 4. Monitoring water pH constantly ...