My assumption: "Copper water tubing is not made to hold the pressures seen in AC work."
Fact: Plumbers copper tubing is measured using the inside diameter (ID) and not the outside diameter (OD) that ACR tubing uses.
ACR work uses dry nitrogen to pressurize the system during pressure testing to try to avoid introducing moisture into the system. The system is then vacuumed down to remove any noncondensables and water vapor.
Fact: The materials used in ACR work are designed around certain chemical compatibilities and properties. We do the work safely by using the right materials where needed.
Opinion: Go mucking around with it using the wrong stuff and you're setting the scene for a world of hurt. CO2 is a no-go for pressure testing in ACR work.
I am for doing good to the poor, but...I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it. I observed...that the more public provisions were made for the poor, the less they provided for themselves, and of course became poorer. And, on the contrary, the less was done for them, the more they did for themselves, and became richer.
― Benjamin Franklin
i like to use carbon monoxcide also to clean and presure test to. i cannetect a tee in the hose and run another hose to the tail pipe of my truck. works like a charm and i save a lot of time no evactuation need and no nito either
co displaces air real well