When connecting the hose adapters gauges make sure that all safety precautions are met.
1. Close both valves on the highway. 2. Connect the adapter to the appropriate pressure gauge ports. Connect the low pressure hose to the service port low-pressure and high-pressure hose to the high pressure port of the service. 3. Hand-tighten the nuts hose adapters.
Fittings for connecting pressure gauges are located on the compressor and high pressure hose.