I left my Air cannon outside during the winter. I was wondering if it is still safe to use or if the cold might have left it unsafe. The air tank is made of 2 PVC caps attatched to a PVC T pipe, in between there is ABC pipe spacers... The center of the T pipe is connected to a valve, which is connected to the shooting barrel at the other end..with standard PVC cement glue just so you get the picture. So yeh was just wondering if it is still safe to use it. I used to put it at 120 PSI on average, and had the balls to use it up to 180PSI. It's a beast. But was just wondering if it is safe to use anymore, now that i left it in the winter.