How do I know when it's time to change the desiccant in my AD5100 desiccant air dryer?

Desiccant bead turns from dark blue to light blue and pink as it becomes saturated. Never allow the desiccant to change entirely to pink or purple. The life of the desiccant charge depends on the moisture and/or oil in the air, how much air is flowing through it and how often the system is used.

In damp environments weekly replacement can be necessary. More.

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