Reverse osmosis (RO) systems today are bulky, difficult to install, and many require electricity and pumps to operate. Most importantly, conventional RO systems are extremely inefficient, wasting up to 24 gallons of water for every gallon of drinkabl...
http://www.waterpurificationsystemforhome.com/brondell-ro-circle-water-saving-reverse-osmosis-water-filter-system-review/
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