Re: HWH aux pump
Reply #25 –
I believe the part that you are referring is the desiccant water filter/separator.
Pink in color means it is water laden and should be replaced or recharged. Blue means that it's OK.
Using the Search function you will find many threads about the Desiccant product.
We buy our in bulk - I think 4# quantities and share it with a FT friend. We then break it down into individual charging amounts in plastic sealed packages. When ours turns pink I replace it with new.
As you will see some have had luck in drying it in an oven or microwave.
Good Luck. 
Edited: The Search link I provided did not show the results when opened. As you are getting to know your FT you will find many interesting things that should be tended to and to be aware. The learning curve seems steep but in reality the process is/was interesting.
Topic: HWH aux pump