Ultraviolet water disinfection is an effective way to fight all bacteria, spores and viruses including pathogens that are resistant to chlorine. This process is a purely physical, and chemical-free. UV-C radiation initiates a photochemical reaction that destroys the genetic information contained in the microorganisms DNA. Disinfection using UV light is quick and clean and no bacteria or viruse are immune to it. UV is an optimal solution which can be applied from sewage water to potable water with wide range of capacity.