The UVMAX C4 Model is a 12 GPM point-of-entry system that renders chlorine-resistant parasites, bacteria and viruses such as Cryptosporidium, Giardia and E. Coli harmless. This system features a stainless steel chamber, lamp and power supply monitor, CSA and CE certifications. The UVMAX C4 has been discontinued with the VIQUA D4 as its replacement.