How often do you drain your air compressor?

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This is an air dryer.

Whats wrong with using copper? I have been using it for 25 years and have never had an issue with it.

In my new shop we ran everything in pex then used copper for all the drop downs.

I personaly would never use PVC but I have seen alot of people doing it.
Nothing is wrong with copper, other than the cost. **** we are running 500 feet of PVC at 120 psi in my brothers new shop off that Atlas Cooper I posted earlier in this thread… His old shop had 40+ year old CPVC running at 125 psi. There were a few blow outs the last few years… lol