On Sunday, February 10, 2019 at 11:02:25 PM UTC-5, wrote:
On Sun, 10 Feb 2019 18:19:31 -0800 (PST), DerbyDad03
wrote:

On Sunday, February 10, 2019 at 12:25:06 PM UTC-5, J. Clarke wrote:
On Sun, 10 Feb 2019 08:24:31 -0800 (PST),
wrote:

I just bought a 100-foot air line from Harbor Freight and snaked that through the walls from the garage to the basement shop. I added a moisture trap and a regulator at the basement end. The compressor runs at 125 psi and I can cut down the pressure in the shop to anything I need for pin nailers, etc. This is really convenient and probably cost less and took less effort than any kind of plumbing.
That being said, a friend used ordinary CPVC pipe which is rated at 200 psi.

And he may luck out and move before it breaks, or he may luck out and
there not be anybody near it when it breaks. You might find a couple
of videos instructive:

https://www.youtube.com/watch?v=IVO4_hUvFsc

How instructive is a video that shows that they couldn't get the PVC to
shatter until they battered it numerous times with a weight of an unspecified
amount from a height of 12' and then *froze* the frigging thing?

For all we know, it would have shattered at 0 PSI after taking all that
abuse and then being frozen. Heck, for all we know, it would have shattered
the *first time* at 0 PSI once it was frozen. Bad example.

It may have shattered without pressure but it wouldn't have exploded,
throwing shrapnel. No thanks.

https://www.youtube.com/watch?v=w1x1UxbD7B0

How instructive is a video of some guy who says nothing more than "Don't
do it" without anything to back up his words other than some videos of PVC
bursting after being subjected to...oh, wait...we have absolutely no idea
what it was subjected to. Bad example.

No, not at all but you're welcome to experiment with your life.

Nothing I said indicated that I plan to use PVC for high pressure air or that I
suggest anybody should.

There's a big difference between pointing out bad examples vs. disagreeing that
with the main concept. Just because those videos do a terrible job of explaining
why you shouldn't use PVC with air doesn't mean that you should.

For example, if that second video had given any indication of what PSI caused the
failures they would be perfect. Since they don't, we have no idea if the test resembled
real world conditions or were just done for effect.

In other words, they weren't very "instructive" other than to proof that you can indeed cause
PVC to shatter while under pressure. Freezing the pipe apparently helps too..