I didnt say it was the right way thats just what we did 20 years ago not knowing any better, we are going to actually gut the shop and remodle it, when we do I will probobly re-do all of the air lines, problem is they are run through a total of three garages.

Kyle

 

Wow, that is a bigun AX. Just a few more squares than my first house. Hope you're in it soon!

 

WOW! nice. My house and garage will fit in there.

 

just to continue the hijack

I have heard rumors of the pvc blowing apart (nothing first hand) but really doubt it, whats the psi rating for 3/4 inch pvc? 280 or something? well within a margin of error if your air lines are at a normal 130 or so. You may have a poorly glued joint come apart, but hardly an explosion.

And economics in time and money is super tough to beat, its what 1/10th the cost for material and probaly 1/4 the install time? I do plan on having mine enclosed within the wall and all 90s coming out the wall will be steel along with a steel nipple penetrating the wall. pvc strips and cracks to easy to be putting any torque on it.

 

The PVC issue for air systems have been the subect of mumerous posts in the past. In the interest of the long term health of all members of this forum, I strongly urge everyone to avoid the use of PVC in high pressure air systems. The issue comes down to shrapnel projection by the air pressure should the pvc experience failure. An impact load is the most likely mode of failure. The difference between water and air or other gases is that compressed water does not expand any measurable amount from say 150 psi to atmospheric pressure while air would expand to over 10 times the volume over the same pressure range. This makes the pieces of the pvc projectiles. PVC will undergo brittle fracture which will not happen with steel or copper, they will fail elastically; what is known as "leak before break". Put another way, PVC failure will be catastrophic, don't take the risk. Don't do it!

I apologize if I touched a nerve with anyone out there and I will get off the stump, but I feel that it is very important to understand the risks that exist with the use of pvc. To each his own.