What does a red circle with a white cross indicate in a tank system?

The red circle with a white cross in a tank system signifies a specific type of fuel. It typically indicates that the tank contains high-grade unleaded gasoline. The color coding and symbol are used universally in many tank systems to provide immediate visual recognition of the fuel type, aiding in safety and operational efficiency.

High-grade unleaded gasoline is distinct from other fuel types, and the use of such symbols helps prevent cross-contamination and ensures that operators and emergency responders can quickly identify the contents of the tank. Other fuel types like diesel fuel, heating oil, or non-potable water are generally indicated by different symbols or color codes that are established by safety and operational guidelines. Recognizing these symbols is crucial for safety, particularly in situations that require quick response or during maintenance activities.