Your call I guess
PVC is not rated for compressed gases, period. The pressure rating does not apply to gas. The method of failure is the real problem with pvc, it grenades w/lots of shrapnel. But everyone is free to do as they wish I guess. You'd think OSHA and state safety organizations banning its use in compressed gas (air) installations would be enough for people to get the message. But as my old motorcycle safety instructor once said "If you've got a $20 head, get a $20 helmet."
If anyone can explain why people are so stubborn about this when A) The dangers are known and real, B)the alternatives are not that much more expensive or difficult to install, I'm all ears