You can also outsmart the water for virtually no cost
I run a 50' hose straight up (after the bowl trap) and over the shop,
then straight down to a T fitting (secured to the wall) where the air to my paint gun tap comes off at a 90* angle,
then continues down another 2 feet to a valve.
I can open the valve to purge the line, but usually the water can't;
A- make the climb the 8 or so feet to the ceiling, or
B- falls down to the bottom of the 2' extension
I also have a cheap $10 HF ball desiccant filter and a small regulator on my gun T to take care of any stubborn molecules that made it through the ninja course.
That way my other outlets have full pressure, and I'm only limiting what goes to the gun.
It's common to be 98% humidity where I am and over 100*.
Works pretty well.