What is not a requirement for a flushometer?

A flushometer is a device used in a plumbing system to provide a large volume of water for flushing toilets or urinals. The requirements for flushometers focus on their functionality, safety, and maintainability.

When assessing the options, the requirement that a flushometer must be chrome-plated brass 12 gauge is not essential. While many flushometers do use durable materials like chrome-plated brass to prevent corrosion and enhance appearance, the specifications can vary. The primary focus should be on the device's performance and compliance with applicable standards rather than the specific materials used.

In contrast, a flushometer must be readily accessible for maintenance and repair, ensuring that plumbing professionals can easily access the device without obstruction. Additionally, having a backflow preventer is crucial to prevent contamination of the water supply and to maintain sanitary conditions, as it protects against the reverse flow of water which can introduce contaminants into the potable water system.

Thus, while material quality is important, it is not a universal requirement for all flushometers, which is why the option regarding chrome-plated brass 12 gauge stands out as not being a strict requirement.