Which device should the tank's fill pipe be equipped with to prevent overfilling?

The fill pipe of a heating oil tank should be equipped with a vent alarm or spill containment device to prevent overfilling. A vent alarm is designed to alert the operator when the tank is nearing full capacity, providing a crucial warning before overflow occurs. This helps to mitigate the risk of spills or leaks, which can be environmentally hazardous and costly to clean up.

The spill containment aspect is also vital; it acts as an additional safety measure, capturing any overflow that may occur, thus preventing it from contaminating the surrounding area. These devices are a critical part of safe tank operations and compliance with environmental regulations.

While other devices like pressure gauges, flow meters, and automatic shut-off valves play important roles in related tank operations, they do not specifically address the need for immediate alerts or containment during the filling process. Thus, they aren't suitable for preventing overfilling in the same direct manner as a vent alarm or spill containment device.