Compressor Fitting HVAC: Description and Operation

The A/C manifold and tube is attached to the A/C compressor, is sealed with O-ring seals, and has the following features:
- The upstream side contains low pressure refrigerant gas.
- The downstream side contains high pressure refrigerant gas and a fitting used to mount a serviceable high pressure A/C charge port valve.
- The downstream side also contains a fitting used to mount the pressure cutoff switch - dual function. A long-travel Schrader-type valve stem core is installed in the fitting so that the pressure cutoff switch - dual function can be removed without discharging the A/C system.