As part of the Professional Series, the VP600 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 Reliable: High-performance UV lamp, rigorously tested to provide consistent output over the entire lamp life (9000 hours) 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 The VP600 inactivates the following microorganisms: Cryptosporidium, Giardia, E.Coli and Fecal Coliform