Effective Replacement: Affordably priced replacement for the VIQUA 602856 UV lamp Compatibility: Replacement UV lamp for the VIQUA J/J+/K/K+, Pro 30, Pro 50, S80, SM80, & SV50 series of ultraviolet water treatment systems. Made in the USA: US Water Filter replacement lamps are manufactured in the USA to provide the highest level of performance and peace of mind with continuous, reliable disinfection for the life of the bulb. Long Service Life: 18,000 Hours lamp life, replace your lamp every two years to ensure optimal system performance Included Parts: Box contains USWF brand replacement lamp, and 2 O-rings. Looking for a value driven, alternative solution to your name brand "factory" replacement lamp US Water Filters replacement lamps are made to the exact same stringent manufacturing protocols, and are backed by a one-year, no-hassle warranty. The USWF-140163 is a replacement for VIQUA 602856 UV lamp, for use in the VIQUA PRO30, PRO50, J, K ultraviolet water systems. This high-performance amalgam UV lamp reduces maintenance requirements by lasting up to 2 years before needing replacement. After 18,000 hours the UV light weakens and isn't strong enough to properly treat your water. Replacing your lamp every 2 years ensures optimal system performance. Safety Note: NEVER look directly at the UV lamp when it is powered on. Follow the instructions carefully to avoid injury to eyes and skin. Includes 2 replacement o-rings.