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Short a/c question 200 1990

posted by  Sumerduckman on  Fri Jul 23 00:48 CST 2004
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last visit: Tue Aug 21 11:31 CST 2007
[RELATED]

R-12 fittings are (usually) 1/4" with external treads. 134a fittings are 1/2" acme with internal threads, just for the caps. The much larger external surface just has a 'ridge'. Any responsable person that converts a system is supposed ( by law) install a prominant sticker stating that is has been converted to 134a, by whom and when. A MVAC tech can put a 'sniffer' on it and identify what refrigerant is in the system, if all else fails.Hope it helps.






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