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Originally Posted by milt
Nope. I have a can of Freeze 12 unopened. Fits the old style gauges just fine.
Good to know about testing, Joe. I never put anything wrong in, so I can still get some folks to give me a charge. I think they buy the R12 in Mexico and keep it out of sight. I know I see R12 on CL all the time.
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It does fit a standard manifold... However if you do the conversion correctly you use different fittings for each of the different types of r12 substitutes unique to the supplier.
Amazon.com: FREEZE 12 CONVERSION ADAPTER KIT FOR NEW CARS: Automotive
Duracool Parts and Fittings
Each has it's own unique fittings by law. You're technically not allowed to mix these in with R12 without performing a complete conversion. Besides, why would you want to? These r12 replacements have different system pressures to make them work efficiently. I'm not some advocate for refrigerants, however you would be breaking the law dropping freeze 12 in without the proper fitting switch.
"...charging one refrigerant into a system before extracting the old refrigerant is a violation of the SNAP use conditions and is, therefore, illegal. Second, certain components may be required by law, such as hoses and compressor shutoff switches. If these components are not present, they must be installed.
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"...EPA does not use the term "drop-in" to describe any alternative refrigerant.
"Each new refrigerant must be used with a unique set of fittings to prevent the accidental mixing of different refrigerants. These fittings are attachment points on the car itself, on all recovery and recycling equipment, on can taps and other charging equipment, and on all refrigerant containers. If the car is being retrofitted, any service fittings not converted to the new refrigerant must be permanently disabled. Unique fittings help protect the consumer by ensuring that only one type of refrigerant is used in each car. They also help protect the purity of the recycled supply of CFC-12, which means it will last longer, so fewer retrofits will be necessary nationwide.
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Choosing and Using Alternative Refrigerants for Motor Vehicle Air Conditioning | Alternatives / SNAP | US EPA
Now Freeze 12 is a bit of an odd one, it's 80% R-134a and 20% HCFC-142b. So running Freeze 12 is not much different from 134a. But this is all academic since Freeze 12 is discontinued, it's replacement Es 12a is just about as expensive as what I can get r12 for here locally.
again.. what you do with your AC in your own garage I really don't care about.