I want to put my air compressor in the back of my shop, but would like to have outlets in the front and maybe a couple of hanging coil type hoses hanging from above.

What would be a safe pipe type to use? My neighbor used copper to do his small shop, is that safe? What about PVC? Also, what size pipe should I use, 1/2, 3/4, etc.?

The total run will be about 40 feet or so, plus whatever hose I plug into it.

Thanks in advance!
Chuck