Commercial reverse osmosis systems require pre-treatment of the incoming water source to assure longevity.
Requirements depend on local water quality.
A softener and backwashing carbon system are almost always required on systems larger than 250 gpd. A backwashing multi-media filter, chlorinator, or other specialty filtration are used when other contaminants are present. After treatment water must be stored in a tank. This water sometimes requires recirculation and disinfection systems in addition to a delivery pump. This is accomplished through ozonation of ultraviolet disinfection.