What safety feature must oil burners, other than stoves with integral tanks, have?

Oil burners, particularly those used in heating applications, are required to have safety features that prevent accidents and ensure safe operation. The correct answer involves having a way to manually stop the oil flow, which is critical for ensuring that in the event of an emergency or if there's a malfunction, the operator can quickly terminate the fuel supply to prevent any hazardous situations such as leaks, fires, or explosions.

This manual shutoff feature enhances safety by providing direct control over the oil flow, allowing for immediate action if unintended combustion or fuel mismanagement occurs. It's an essential aspect of the overall safety protocol in oil burner operations, ensuring that operators can respond effectively to any hazardous situations that may arise.

Having a manual cutoff aligns with the broader regulatory framework aimed at protecting operators, property, and the environment from the potential risks associated with oil burners. Other options, while they also contribute to safety in their own way, do not directly provide the same level of immediate control as a manual shutoff device does.