Profile: Smith Engineering Inc. manufactures custom water treatment equipment. We deal with water pre-treatment systems, reverse osmosis systems and exchange de-ionization systems. The reverse osmosis system removes ionic and organic impurities without the need for regeneration chemicals. It has standard options such as single/two pass systems, custom control systems, custom skid units and pH adjustment. The exchange DI tanks use cation and anion resins to remove ionic impurities from water.