Which labeling standards apply to water-based extinguishers?

Water-based extinguishers, such as those utilizing water or aqueous film-forming foam, are subject to specific labeling standards that ensure they are compliant with safety regulations and properly indicate their use. The standards mentioned in the correct answer, ANSI/UL626 and CAN/ULC-S507, specifically address the performance, testing, and labeling requirements for fire extinguishers, particularly fire extinguishers that contain water or water mixtures.

ANSI/UL626 provides guidelines on the construction and performance of portable fire extinguishers, while CAN/ULC-S507 parallels these standards for Canadian products. These standards ensure that the extinguishers have undergone rigorous testing to verify that they function correctly when needed in case of a fire. Proper labeling is crucial, as it helps consumers identify the type of agent within the extinguisher and understand its applications and limitations.

In contrast, the other options pertain to standards that either do not specifically relate to water-based extinguishers or focus on broader quality management systems and different kinds of extinguishing agents. This highlights why the standards in the correct answer are specifically aligned with the requirements for water-based fire extinguishers.