When 1/4 of the cartridge has changed to the used color, it's time for a new cartridge.
An AES-supplied demineralizer cartridge comes to you brand new, and the pellets in the tube appear to be a purple and white variegated color. As the water flows through the cartridge, the color of the pellets change to a yellowish color.
In this video, we show you how to identify when your demineralizer cartridge needs to be replaced. We then demonstrate the quick process of replacing the cartridge. Following this easy maintenance tip will limit downtime and prevent future humidity testing headaches.