The UVMAX B4 Model is a 6 GPM point-of-use 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 B4 has been discontinued with the VIQUA VH150 as its replacement.