"Andy" wrote in message
...
On Mar 28, 5:44 pm, "Fred Blair"
wrote:
I checked in the garage and found 1/2 inch schedule 40 PVC rated to
600 PSI at 73 deg F. That seemed high so I looked for some other
samples. I found 1/2 inch with 480 psi and 400 psi ratings.

Andy



I know it's often done, but you may want to avoid using PVC or similar pipe
for compressed air, especially if it's exposed above ground. Do a Google
search on compressed air, PVC pipe accidents or see:

http://www.osha.gov/dts/hib/hib_data/hib19880520.html

The problem is that PVC pipe will become brittle with age, UV exposure, oil
contamination or cold temperatures. When it goes bang, the little pieces
become shrapnel.

More expensive, but the save way to go is copper for permanently installed
air lines. Another advantage is that fittings, including threaded etc, are
readily available and soldering is easy.

bumper
zz
QV and MKIII
Minden