BobL - going out on a limb here.
I was talking with a spray painting mate and he recommended the use of Steel Camel filters for the lines with spray guns.
Maintenance, Repair and Overhaul Products for Corrosion Control of Heavy Equipment and Cranes
Steel Camel is specifically designs to utterly dry moisture from compressed air.
NOW I was thinking about this post of yours! Given water pressure can be 500psi up to 1000psi - could I not get a clear water filter housing, add in a 0.5 micron filter and some visual indicative desiccant around it as you have? i.e. get a Really Big One like this? (20").... or put three in line.
I've seen a few in an online search that are 18" x 6".
I'm spraying, so I don't need 100psi... I strangle it to 15psi at the guns anyway.... so if I get 80 - or whatever - out the end of it I'd be pretty happy.
One could easily just use plumbing fittings to attach it to the air lines.
The clear tube will allow one to easily see when it's time for the oven!
Thoughts?
Attachment 456062
e.g.
https://www.clarencewaterfilters.com...lter-housings/