Not Ranked
Not unless you want to kill yourself. They aren't made for air pressure, only liquid and not the type of pressures that you see in a compressed air system. Check garagejournal.com for extensive discussions on this very subject. Only use black pipe, heavy wall copper pipe or pex rated for air, rated at 300 PSI burst pressure. Some will say yes, but your wife is worth more than a few dollars for cheap air lines.
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