What must a portable fire extinguisher carry to be leased, sold, serviced, or installed legally?

A portable fire extinguisher must carry an approval or listing label from an approved testing laboratory to be legally leased, sold, serviced, or installed. This label indicates that the extinguisher has been tested and meets specific safety and performance standards established by recognized organizations, such as Underwriters Laboratories (UL) or Factory Mutual (FM). These standards ensure that the extinguisher is reliable and effective in the event of a fire.

The presence of this label guarantees that the fire extinguisher complies with safety regulations and industry standards, making it safe for consumer use. It provides assurance that the extinguisher has undergone rigorous testing for quality and performance, ensuring that it will function as intended to suppress fires.

In contrast, other options such as a warranty label, an operational manual, and a standard safety certification, while useful, do not hold the same legal requirement for the sale or service of a fire extinguisher. The approval or listing label is the key indicator of compliance with safety standards mandated for portable fire extinguishers.