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    T Mihalic's Avatar
    T Mihalic Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 17, 2008, 04:20 PM
    Air conditioning
    Hvac-Can you use the same copper tubing when changing from r-22 to r-410a

    Thanks tom
    rsain2004's Avatar
    rsain2004 Posts: 207, Reputation: 6
    Full Member
    		  
    #2

    Jul 17, 2008, 04:56 PM
    My understanding: R-410a uses a synthetic lubricant which is not compatible with the lubricant used by R-22. When mixed, they become corrosive and corrode the copper and other metal involved from the inside, out. There is a "flushing" procedure to use before converting from one to the other. My experience is over the longer term,(years), it's not 100% effective. Try searching ASHRAE, maybe you can find some info/help. Good luck...
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Jul 17, 2008, 06:06 PM
    Yes you can with the proper flushing as was mentioned before. My choice would be to replace the copper line set and be done with it.
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