I use a propane tank painted appropriate EPA colors for the recovery cylinder.
A salvaged 1/2 T scroll compressor from a free CL AC unit is the compressor.
Had the 4T compressor fail on my heat pump (bearing). Recovered near 100% of R22 charge, near enough did not have to add any R-22 to get the same pressure readings after re-charging from the propane recovery cyl.
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