How to Dry Compressed Air

I have a bowl separator on mine at the output of the tank.

I also have a long-ish run like pot #4 but not as many courses, basically just up about 6 feet, across the shop, and down.
MUCH harder for the water to travel up, and if it does make it, when it comes down the other end, put your air fitting ABOVE the bottom end of the pipe and put a drain valve at the bottom.

I take it one step further by having a dedicated outlet connector for my paint gun that also has a regulator and small HF desiccant filter.

Low buck all the way and works great.