Ultraviolet Light Water Purifier Whole House UV Sterilizer 12 GPM +2 Extra Bulbs + 1 Extra Ballast + 1 Extra Quartz Sleeve POWERFUL & RELIABLE: 55W Whole House 12 GPM UV Ultraviolet Sterilizer Water Filtration Unit SAFE: This system is good to kill harmful Bacteria, EColi, Viruses Fungi, Algae & Microbes STRONG: Stainless Steel Unit Capacity: 12 GPM Inlet/Outlet: 3/4" US Standard NPT 36" UV lamp: 55W 110V COMPLETE SYSTEM with Mounting Clamps, 1 Extra Quartz Glass Tube, 1 Extra Ballast and UV Bulb Plus 2 FREE Replacement Bulbs LONG LASTING 2 Extra UV Bulbs. Change Times: 1 Year