This guy couldn't be bothered to make saddle bends; he simply slipped his new pipe under the pre-existing, PVC air pipe!
I'm actually commenting on the silver EMT, which I know to be new. The white plastic air line, if you look closely, has a nice accumulation of dust atop it.
As for plastic pipe and 100PSI air- well, that's another forum! (You've already seen how the compressor was hooked up- why should the air piping be any more competent?)