they don't use R-12 much anymore. It is very expensive, requires a license from the EPA to buy, and special equipment to use. R-134A is what is used in all current automobile air conditioning systems, and most of the the newer small home refrigerators and water coolers.
The hoses and gages used with R-134A don't work with R-12. Different connector, the whole bit.
7 posted on 07/12/2010 12:52:29 PM PDT by Old Student