Service Port HVAC: Description and Operation

A/C SERVICE GAUGE PORT VALVES

The high-pressure service gauge port valve is located on the compressor manifold and tube assembly.
The low pressure service gauge port valve is located on the receiver/drier.










The fitting is an integral part of the refrigeration line or component.

- Special couplings are required for both the high side and low side service gauge ports.
- The Schrader-type valve core can be replaced if the seal leaks.
- Always install the A/C charging valve cap on the service gauge port valves after repairing the refrigerant system.