In most shops yes, but sometimes they dont ask for a license.
R22 needs import license,R410A does not need anything special
you have to have an ozone depletion license to buy it now.
Wal-Mart do not have r22 freon, this is a false ad.
No, because R22 is a 'harmless' gas. Just observe the material safety data sheet (msds) and keep it on hand.
Most home systems use r22 which requires a license to purchase. The only refrigerant available to the consumer is automotive r134a.
Envirosafe sells R22a, a propane based freon that they claim is compatible with R22 systems, but to add this to your system legally you have to first have your system evacuated of reg. freon 22 by a recovery sytem, it is against federal law to release it into the atmosphere as well as mixing different types of freon. The good news is that it costs less than R22, they claim it is more efficient than R22 and you don't need a license to buy it. Although you seem to know what you are talking about just one question what is the difference in reg. FREON and R-22?
Either Type I, Type II or Type III will be fine.........
After 1992- r134A Before 1992- R22 but it need to be retrofitted for R134 if it hasn't been done already. It is ILLEGAL to use R22 in autos.
No the whole system need to be evacuated of the r22 before you put r22a in the system. It's against the law to mix 2 different freons together and also dangerous.
short answer: Only people with and EPA certification may purchase R22 and/or R410A refrigerants.
No. the pressure are different, r22 runs at a fairly low pressure and you shouldn't be worried about blowing your gauges, but you won't be able to determine your super-heat or sub-cooling. for a about $100cdn you can buy the right gauges.
Graingers is the only place I know of... sells it in a 30lb container. <><><><> R11 and R22 are restricted items- be prepared to show training and equipment for recycling- and be prepared to pay an arm and a leg. If you have an older AC unit, check on getting it changed over to another refrigerant. Sale of R22 isregulated by the EPA as an ozone depleting refrigerant.