I agree with 69Widetrack on the desiccnat dryer. They are kind of expensive but they work really well. I have a homemade one that im working on for the air line system that i plumbed into the walls of my garage but i also have one from Ingersol Rand that is about 6"in diameter and about 16 inches or so long. My small angle grinders use to get enough moisture going through them that they would freeze up if it was cold outside. I put quick disconnect Milton type M fittings in my system but what ever you like will work. When using the IR Dryer it has a radiator petcock on it and i usually tilt the dryer so any moisture runs to the bottom and just crack the valve a little so any moisture that condenses will run out. This saves on the desiccant use. BTW pure crystal cat litter is a great desiccant and its cheap in comparison.