***...Reverse Osmosis (RO) is a membrane process in which solutions are desalted or concentrated using relatively high hydraulic pressure as the driving force. In the RO process the salt ions and other contaminants are excluded or rejected by the RO membrane while pure water is forced through the membrane by pressure. Ionic uses RO technology for seawater desalination, in ultra pure water systems and in point-of-use systems for the home.