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  1. #14
    Join Date
    Mar 2002
    Richmond, Virginia
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    Was the R410a system in a vacuum? If not, wouldn't the R410a pressures have exceeded the pressures in your R22 gauges?
    There is nothing more frightful than ignorance in action....Mark Twain

  2. #15
    Join Date
    Jul 2002
    St Paul, Minnesota
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    yellow jacket guages

    A new manifold set has R-410A,R-404A,R-22 markings.

    Manufacturer says using on any of these refrigerants will not contaminate the system. I would guess they want you to empty your lines after checking pressures and before going to a different system.

    Anyone seen these. I saw them at Sid Harveys.

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