Thermo Water Purification System purification technologies include Solutions for your most critical and everyday application needs, from RO, DI, UV and EDI (Electro Deionization) and Distillation.The Smart2Pure system is a compact system that converts tap water into both ASTM Type I and Type II water. The Smart2Pure 3 and 6 systems feature a built-in 6 L reservoir to store the Type 2 water.