Have you experienced a handpiece that has had a leak from the water coolant? The most common culprit for these types of leaks is the water relay valve. While the cause may differ in various units, most systems incorporate some form of a water relay valve or "Clippard valve". This video walks you through the easy process of replacing this valve.
As you can see in the video, changing a water relay is a simple process that can be accomplished in just a few minutes.