How about nylon tubing? This is similar to what I use:

http://www.wicksaircraft.com/catalog...hp/subid=1745/

425psi working pressure, 1700psi burst, it connects easily with brass
compression fittings and it's flexible making routing easy. All for
$0.91/ft.

-Brian

Max wrote:
Is there any consensus on whether or not to use PVC or CPVC for air lines?
My compressor is capable of 150psi.
I already have copper for most of my distribution system but I need to add a
branch and the copper prices are profanity inducing.

Max