Pure Aqua, Inc. designs and manufactures water treatment systems in addition to a twin alternating activated carbon filtration system. This twin alternating activated carbon filtration system was designed to filter 150 GPM in USA in March 2013. This system's main purpose is to prepare feed water for reverse osmosis. There are four kinds of media used in this filter, granular activated carbon, course grade, medium grade, and fine grade. The backwash can be activated by a pressure drop, setting a time, or chlorine levels in the filter. For more information click here: http://www.pureaqua.com/water-filters.html
