As part of the Professional Series, the VP600M offers outstanding performance for commercial applications, for flow rates up to 24 gpm (91 lpm). Benefits: Convenient: Features countdown timer with digital display and audible lamp change reminder for ease of maintenance Reliable: The constant current feature ensures stable UV lamp output, regardless of power fluctuations High-performance UV lamp, rigorously tested to provide consistent output over the entire lamp life (9000 hours) State of the art UV sensor technology to give you real-time performance feedback, for added peace of mind Space Efficient: High UV output lamp technology allows for a smaller footprint, while providing the same UV performance as a longer chamber Application: Perfect for a wide range of commercial applications Application: Perfect for a wide range of commercial applications including, small businesses, hospitals, dentist offices, etc. Included Accessories: UV Sensor Optional accessories: Solenoid valve which will stop the flow of water through the chamber should the UV performance fall below a certain level The VP600M inactivates the following microorganisms: Cryptosporidium, Giardia, E.Coli and Fecal Coliform.