Thanks for the update and photos Couv. That looks like a nice clean installation. I'm remembering my own adventure with BSP, AN-4, and JIC connection systems. It sure is nice that there are adaptors that allow them to work together!
Hydraulic Supplies... I think I got some of my adaptors from a place called "Hydraulic Supply" on line. I got a really nice fill whip hose... Nice thick rubber and rated for very high pressure.
I'd like to ask how you adapted the Chinese filter tube to hold you filter media? The ones I saw only has charcoal. And then ends looked glued on. So, I had to modify a Lawrence Factor filter tube to allow changing media. How did you do your's?
P.S. Nothing wrong with check valves to keep everything from going backward. As for the PMV, I have installed a BPR (Back Pressure Regulator) on the tank end of my fill whip. This assures that nothing gets out of the system unless it is at 1800 psi or higher... Gives highest condense and filter efficiency.