Originally Posted by LarryBible

I did not say that it was a violation of Federal law to USE other refrigerants. I said that it was a violation if you used other than R134a with R134a fittings installed. By Federal Law you are supposed to have the fittings installed that are appropriate for the refrigerant contained in the system. Additionally the system is supposed to be labeled.

This law is probably broken more often than the speed limit, but it is the law.