[EricH]

Originally Posted by MartyG33

The rule says functionally the same with the inside diameter set. But does that include copper? It is functionally the same, but it does not act the same.

The way to read the FRC rules is as follows:

If it is not specifically banned or otherwise disallowed, it is permitted.

Now, the pneumatics rules specifically state that anything that is not specifically permitted is prohibited. Copper tubing, however, would probably fall under the pneumatic tubing (though note: it should be sold as pneumatic tubing if you want to make life a little easier at inspection).


That said, CD is not the Q&A. I suggest asking the Q&A.