Service Port HVAC: Description and Operation

The high-pressure service gauge port valve is located on the front condenser to evaporator tube.







The low pressure service gauge port valve is located on the A/C manifold and tube.

Service Gauge Port Values:

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.