copper vs pvc compressor lines?

Oklacarcollecto said

Never PVC... I had a friend that had a line blow up and drove a piece of it through his eye and in to his head. He lost the eye and spent a long time in the hospital. The 600psi is a water pressure rating and water just shoots a stream instead of shrapnel going everywhere.

I run 3/4 galvanized iron pipe.

Click to expand...

Since water is basically non-compressible, a high pressure water line will bleed to zero pressure with a very small amount of fluid release. Compressed air, on the other hand, has a tremendous amount of stored energy, and will take a long time to go to zero pressure if a leak/hole develops.

That is why water is used to test piping systems to ensure the integrity of the system instead of air.