I recently found the compressor I have been looking for and am getting ready to plumb my shop. I am leaning towards the Rapid Air system mostly because I want more than several locations for air outlets and reels.
Black pipe would be my first choice but running 20ft pieces by yourself can be difficult(my ceiling is high). I can do the RA pipe on my own.
Reading this was all the info I needed to not consider PVC
http://www.osha.gov/dts/hib/hib_data/hib19880520.htmlBilly
