"Dave Balderstone" wrote
Max wrote:

Is there any consensus on whether or not to use PVC or CPVC for air
lines?

If you like the idea of PVC shards being driven about the shop by 150
psi pressure, I say go fer it.

Sounds fascinating but I think I'll pass.
I considered black pipe but it's heavy, ugly, and a hassle to cut and thread
even though I have the required tools.
Over a hundred bucks for the copper choice but what the hell, it's only
money.

Max (bemoaning the price of copper)