Since we're talking about orifice tubes and pressures I thought I'd post here, (sorry @Scooterwrench if it isn't proper. Let me know if you want me to go away) I just received my new R134a Low Pressure Cycling Switch (thanks @L31MaxExpress for that) and connector, in case I have a problem adjusting the 36 year old one. The switch shows rated, open @ <21 PSI and closed @ >42 PSI AND has the adjusting screw between the electrical connector blades, you can see it in the picture. The funny thing is, the white threaded fitting that goes on the Accumulator/line is made out of plastic maybe that's a good thing...
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