iSpring #UVF55 - Whole House 12GPM 55W UV Disinfection System / Ultra Violet Sterilizer. Minimum pressure loss with 1.0 inch MNPT inlet/outlet Effective disinfection for bacteria, virus, and protozoan cysts 304 Stainless steel chamber with 1.0 inch MNPT inlet / outlet. Minimal pressure reduction - typically around 5 PSI Philips brand lamps; 80-130 v / 50-60 Hz.Flow rate: 12GPM; Last 9,000 hours Electronic ballast with audible and visual alarm The whole system is backed by a 1-year manufacturer warranty and iSpring's unique lifetime technical support provided right here in the USA in Alpharetta Georgia.