The Compact Aqua RODI-C system from Aqua Solutions Inc., of Jasper, Ga., combines reverse osmosis pretreatment and Type I reagent grade water purification in a cabinet just 20” wide by 20” high by 12” deep. The system is ideally suited to applications where the existing central RO, DI or distillation pretreatment system is either unreliable or overloaded, or where space or funding limitations preclude purchasing separate RO and Type I DI systems.