What does the overfilling prevention device NOT serve as?

The overfilling prevention device is primarily designed to prevent tanks from being filled beyond their safe capacity to avoid hazardous situations such as leaks or explosions. It operates by triggering an automatic shut-off when the liquid reaches a predetermined level, preventing overfilling.

While it plays a critical role in safety, it is not the primary means to determine the maximum filling limit. That responsibility typically lies with the specifications provided by the tank manufacturer and industry regulations, which establish the fill level based on the tank’s design and purpose.

The overfilling prevention device does have functions akin to emergency shut-off mechanisms, serving as a backup safety feature in some cases, and it may work in conjunction with pressure relief devices to enhance overall safety. However, its main purpose is not to determine the maximum fill limit itself. This distinguishes it from other safety devices and features integrated into propane storage and handling systems.