What type of valves must be provided when multiple fuel systems are installed on a vehicle?

When multiple fuel systems are installed on a vehicle, it is essential to utilize automatic valves. These valves are designed to function without the need for manual intervention, ensuring that fuel flow is managed efficiently and safely across different systems. Automatic valves can be equipped with sensors or electronic controls that respond to various conditions, such as pressure changes or system failures. This capability enhances safety by allowing for immediate adjustments or shutdowns in response to abnormal situations, preventing potential accidents or system malfunctions.

Using automatic valves, particularly in complex fuel systems, helps streamline operation, reduces the chances of human error, and ensures compliance with safety regulations that govern the use of multiple fuel types in vehicles. This is essential for maintaining fuel integrity and managing the specific requirements of each fuel system effectively.