Snip
IMPORTANT SAFETY NOTE: If you plumb a compressor permanently in the
shop do NOT use any sort of PVC plastic pipe for the air lines. When
it breaks, it grenades, and that can be just as deadly as it sounds if
you're in the wrong place at the wrong time. Use copper pipe
(soldered or brazed), black iron or galvanized pipe, with a piece of
hose as a vibration isolator between the compressor and plumbing.


There are plastic pipes designed for air use but they only go to 1/2" which
may not be large enough for a big comp. They are reliable though and the
push fittings are quick to install.

John