Donnellan Ultraviolet

Since 1999, Donnellan UV (Sunlight Systems) has manufactured ultraviolet (UV) light disinfection machines. Today, we do business as Germicidal Systems (GermSys) and sell our products through authorized resellers.

We design, engineer, manufacturer and distribute products for various markets including wastewater and clean water. Our primary products are the Horizontal and Vertical wastewater product catalog of Siemens / Sunlight Municipal and our Teflon non-contact style tube reactor, the NONCON.

We distribute these and other products through UVSYSCO, LLC. For information please visit