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Old 08-27-2011, 05:44 PM
rscurtis rscurtis is offline
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Join Date: Oct 2007
Location: St. Thomas PA
Posts: 957
410 works at much higher pressures than all the other refrigerants- I doubt you'll find a single set that will do all. I have a set of MAC tool guages, #AC888, they are for R12 and 134. I have also used them for R22. My residential AC unit has a warning clearly not to use standard guages on it, as the pressures will exceed their capacity. It runs at 100 psi on the low side, and over 300 on the high.
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