I have a Low Pressure guage for what I KNOW to be for R134a.
My question is, are the fittings for 134 and 12 different so that my guage will not fit any of the pressure ports on a R12 system?
I have a car in the driveway, and my guage fits the Low Pressure side. Since my guage is for a known R134 system, then the car I'm working on is also
134, right?