HVAC 042 A Gauges and hoses on and off the simplest way without contamination.

how to put the gauges on and off the ac system without contaminating the system.
I realize this method may be different than you may have learned. Be sure and watch all 4 parts of this series to see why.
This is the fastest simplest way to remove the gauges without contamination.
HVAC 042 B HVAC 042B part 2 bleeding across the ...
HVAC 042 C HVAC 042C Part 3 Manual low loss valv...
HVAC 042 D HVAC 042D Part 4 Purging the hoses be...