The arium&reg 611 is capable of producing water with 18.2 MΩ x cm resistivity with extremely low Total Organic Carbon (TOC) level &lt 1 ppb, endotoxin level &lt 0.001 EU/ml and a flow rate up to 2 l/min. Depending on the application requirements for water quality four different units are available, which include one or more of the following water purification techniques; deionization, UV oxidation, and/or ultrafiltration. Each of the four models utilizes a basic resin cartridge pack specific to the incoming water quality. These cartridge packs have a patented design, which allows for higher volume packing of media and results in higher total binding capacity and lower operating costs. The flexibility of these systems allows the use of tap water as a source of feed water.