I know this sounds silly with current price of R22. I know it's not the "right" thing to do. But.
Have a small MO99 walk in with a flashing sightglass. I don't stock MO99 and rarely see them. I do stock R22 as there are plenty of R22 systems still in the field. So the question is do I clear the sightglass with my R22 (likely around 1lb) or buy a fresh tank of MO99 that I will likely never need again.
MO99/R22 saturated temps obviously pretty close.
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