Aqua Ultraviolet Viper 800 Watt NEMA Transformer, For Plastic Units 220V/60HzFor Aqua Ultraviolets Viper Series of UV sterilizers for professional use, a transformer is sometimes needed to have the UV light water treatment work with the pre-existing system it is being installed into. To help the Viper series work seamlessly, Aqua Ultraviolet has four types of Viper NEMA Transformers available for plastic units in wattages ranging from 400 to 1600. Check out Aqua Ultraviolets UV sterilizers to learn more about the Viper Series.