What type of refrigerant is typically in refrigerators, window A/C units, freezers, etc.? I'm guessing R22? Or maybe evil R12? Will standard schrader-based manifold gauges attach properly to pull vacuum and read pressures? Has anyone ever filled with R134a and PAG?

TIA

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280