Osmosis is a naturally occurring function. If a membrance is placed between dirty water and clean water, the clean water naturally migrates through the membrane to the dirty water. Reverse Osmosis is the process where, under pressure, dirty water is forced through a membrane to join the clear water, thus purifying it.

All Reverse Osmosis Water Purification systems depend upon one form or other of a semi-permeable membrane. The membrane does not act precisely as a filter, because passage through the membrane is not entirely a function of physical size. Instead movement across the membrane depends upon the specific bonding characteristics of each module.

Water and gases such as oxygen have the ability to make and break the binds necessary to move the molecule structure of the membrane.