iSpring UVF11B-A 1-GPM 11-watt 220V UV Disinfection Sterilizer System Kills 99% of all bacteria and virus! 220V 11W UV lamp in stainless steel chamber Built-in flow sensor switch Complete ADD-ON Kit, can be added to most RO systems as a final stage to the system Flow rate: 1GPM; Last 8,000 hours