In a water purification system, the goal is not to dilute the salt solution, but to separate the pure water from the salt and other contaminants. When the natural osmotic flow is reversed, water from the salt solution is forced to pass through the membrane in the opposite direction by application of pressure-thus the term REVERSE OSMOSIS. Through this process, it is possible to produce pure water by screening out the salts and other contaminants.
PUREPRO (2012): User’s Manual. LUX-106R-P. Illinois: PurePro USA Corporation URL [Accessed: 17.04.2012]