A2L refrigerants 1St take the actual class 2nd follow safe practices 3rd, There is mandated for A2L tools vacuum pumps or recovery machines. There is no standard, there is no UL rating there is no UL testing for this equipment. It is entirely self certified. Some manufactures have made a lot of changes and some found the equipment is safe the way it is with proper practices. I instringically sealed is nice but it is not a requirement nor is it mandated by any organization or agency. | Ty Branama
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