The PRO50 Model is a 50 GPM point-of-entry system for commercial applications that renders chlorine-resistant parasites, bacteria and viruses harmless. This NSF certified system will track actual, real-time UV dose for a particular flow. Additional features include high UV output for NSF Class A installations, lamp age indicator, malfunction monitor, CoolTouch fan and stainless steel chamber. *UVMax PRO50 has been renamed VIQUA PRO50. Replacement parts available below.