What color hose on an MGA is used for utility?

The color yellow is specifically designated for utility applications in the context of refrigeration and HVAC systems, particularly on a manifold gauge assembly (MGA). This standardization helps technicians easily identify the purpose of each hose during service operations.

By using yellow for utility hoses, it distinguishes them from those used for high-pressure (often represented by red) and low-pressure (often represented by blue) applications. The utility hose is typically utilized for connecting to additional equipment or for transferring refrigerants. This color-coding system is essential for ensuring safety and efficiency in HVAC service, allowing technicians to quickly and accurately connect the right hoses while minimizing risk and error.

The other colors represent different functions and are important for their designated uses, which is why understanding this coding system is crucial for effective and safe HVAC operations.