Reverse Osmosis is reversal of natural process of osmosis - a process by which a dilute solution will pass through a semi-permeable barrier to a more concentrated solution. In reverse osmosis, a pressure in excess of osmotic pressure is applied to a concentrated solution, forcing essentially pure water through the semipermeable membrane, leaving behind the dissolved solids. The result is a pure, essentially mineral-free stream of water.

Reverse Osmosis is reversal of natural process of osmosis - a process by which a dilute solution will pass through a semi-permeable barrier to a more concentrated solution. In reverse osmosis, a pressure in excess of osmotic pressure is applied to a concentrated solution, forcing essentially pure water through the semipermeable membrane, leaving behind the dissolved solids. The result is a pure, essentially mineral-free stream of water.