Bib is right about not being rated for compressed air use. The stuff is terrible when exposed to UV.....that's why it is painted or covered when exposed outdoors.

Also, you should consider taking the pressure off the system when you are not using it.....nothing worse than coming home from work and finding that your compressor has been running all day.....well, there are things worse but you know what is meant.

Why not consider a copper system? A 10 ft length of 1/2 copper is about $10. For a 30 ft x 30 ft garage, you can do the perimeter of three sides for 9 sticks plus the verticals plus the fittings. Sweating copper is super easy.

mike in tucson