I connect this right off my compressor.
https://www.amazon.com/dp/B005JDKY68/?tag=fabo03-20
Then I ran 3 legs of copper off the compressor, up down....up down....up down..... and back up with a ball valve at the bottom of each drop. Then I connected it to a standard filter kinda like this one (this filter might be redundant but I figure it's better to be safe than sorry if painting)
Milton Air Compressor Micro Filters 1018
then it goes into this
Motor Guard Compressed Air Filters M-60
then into this
Rockwood 3/8” NPT 2 Stage Air Filter Dryer System
right at my tool I then connect this
Performance Tool Air Compressor Line Filters M695
The heavy lifting is done by the Motor guard and 2 stage desiccant filters. I attempted to just use that little filter I posted at the end and after a couple compressor cycles, the moisture just over powers it and it's useless. It's really just meant to be a last line of defense. After I did this setup, I no longer have any moisture when primering or blasting.