The PRO20 Model is a 20 GPM point-of-entry system that renders chlorine-resistant parasites, bacteria and viruses such as Cryptosporidium, Giardia and E. Coli harmless. This NSF certified system features a UV output sensor, lamp age indicator, malfunction monitor, CoolTouch fan and stainless steel chamber.*UVMax PRO20 has been renamed VIQUA PRO20. Replacement parts available below.