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Originally Posted by Leo M
Please, do not, under any circumstances, pressurize PVC pipe with air. Anyone who has ever been around exploding plastic pipe knows the terrible consequences - the energy released creates shrapnel moving at high velocity. This occurs suddenly; the brittle fracture mechanism of PVC gives no warning.
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Like I said, you are strapping a bomb on your robot.
I have no doubts that you may have used PVC successfully in your spudgun applications, but FIRST can't just let any hack with a supply of PVC and pipe cement make their own air tanks. I would imagine there is a very high amount of quality control and inspection done on those Clippard accumulators to make sure they meet stringent standards. That's not something that will happen with your homemade tanks.