The Culligan Aquada Proxima 4 is a 4 gallon per minute point-of-use UV system and is their upgraded system. The Proxima series offers UV water disinfection with additional features such as micro-computer controller, visual and audible alarms, easy button reset for alarm and computer, and a power connection for an optional solenoid safety shut-off valve. Find Culligan compatible parts for other Culligan UV systems.