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    jimmy73's Avatar
    jimmy73 Posts: 1, Reputation: 1
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    #1

    Nov 16, 2011, 09:07 AM
    Can I re-use an old line when replacing my central HVAC system?
    Can a old line set be flushed and reused to replace a home hvac system
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Nov 16, 2011, 10:07 AM
    Not really, if you are replacing an old r22 system with another r22 unit, after flushing you can
    But replacing r22 unit with condenser using a different refrigerant like 410A is a no-no
    Doubtful you could get every drop of r22 oil out of lineset
    MCC1010's Avatar
    MCC1010 Posts: 4, Reputation: 1
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    #3

    Nov 23, 2011, 06:41 AM
    Yes they sell a flush kit to go from r-22 to 410-a. You must do this correct because the two do not mix and can damage your new unit
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