This utlizes UltraViolet light to combat waterborne pathogens while adding nothing to the water except for UV light. Provides full protection for your Viqua S5Q-PA and S8Q-PA systems. THE VIQUA PROMISE: Whether you choose a point-of-entry or a point-of-use system, your VIQUA UV system will disinfect against microbiological contaminants, providing you and your family with treated drinking water.