The flushometer valve is typically protected by which device?

The flushometer valve, which is commonly used in commercial toilets, needs to be protected from backflow to prevent contamination of the potable water supply. A non-pressure-type vacuum breaker serves this purpose effectively.

This device operates by creating an air gap that prevents the back siphonage of water. When the flushometer is activated, if there is a drop in pressure in the system, air enters through the vacuum breaker, preventing any water from flowing back into the potable line. Since this type of vacuum breaker does not operate under pressure, it is ideally suited for fixtures such as toilet valves where back siphonage might occur during a flush.

Understanding the function of a non-pressure-type vacuum breaker is essential in ensuring that the water supply remains safe and free from pollutants, aligning with the public health and safety objectives that sanitarians prioritize.