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r-22 conversion to 421a choice refrigerant

fellas this is the replacement for r-22, no many parts house carry it, but you have a EPA card and are a legitimate business I will sell it to. I have used it for years to years there is no decrease if eff, no oil changes required.



david broome
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Comments

  • TechmanTechman Posts: 2,056Member ✭✭✭
    Conversion

    how about TXV and/or orifice changeout due to new superheat readings w/ the 421a?
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