You don't miss your water until your well runs dry. With clean, potable water becoming an ever more valuable commodity, EcoWater Systems is in a pristine spot. The company manufactures commercial and residential water treatment systems. It sells its products through a network of more than 1,400 dealers, plumbing wholesalers, and private-label retailers. Products include water refiners, conditioners, and purifiers, and innovations such as reverse osmosis drinking water systems. EcoWater Systems is a member of Berkshire Hathaway's Marmon Group and maintains an autonomous management team.