Quote:
Originally Posted by leathermang
The more usual way to check for leaks is to pressurize with Nitrogen and four ounces of R22 ( which the EPA allows you to vent legally )..
This would negate any potential oil compatibility issues .
And would usually cost less than having the R134a evacuated by a pro with the proper equipment charging for their time...
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Generally I spare no expense to do a job right, but just thinking out loud... I have a Co2 extinguisher, a regulator and a good deal of r134a.
Would the pressurized leak test be viable with co2 and r134?
My understanding is that this would be done statically without the system operating, so oil miscibility and flow would not be a concern.
Just saves buying stuff I’ll hopefully never use again, and buying r22 (for which I have a license so I can procure, just like r12) merely to vent.
Thanks!!