We do also offer another purification system called REVERSE OSMOSIS. Reverse Osmosis removes about 90% of the minerals in your water in addition to everything that Micron Purification does. Most regions in the USA do not require this technology – it is mainly beneficial in areas where the municipal water supply has very high concentrations of salt. This system is an additional $199/cooler and takes a little longer to install because it has to be tied to a drain. Reverse Osmosis installations, unlike micron filtration, require access to a sink.