Pro Products Sani-System SS96RO reverse osmosis (RO) sanitizer is designed to clean RO units. Sani-System liquid concentrate is efficient and easy to use. It is pre-measured in the correct dose for your system. Do you want to keep your reverse osmosis system delivering consistently high quality water gallon after gallon? Keep your RO unit functioning at peak efficiency with Pro Products Sani-System. Change your RO pre-filters and membrane at the recommended frequency, and clean your system each time with a premium product like Sani-System.