New York Low Pressure Boiler COF Practice 2025 – All-in-One Guide to Exam Success!

The purpose of a pressure vacuum breaker in a boiler system is to prevent backflow. This device is essential for maintaining the safety and integrity of the water supply by ensuring that water flows in the intended direction. In the event of a drop in pressure, such as when a system experiences a sudden loss of pressure, the pressure vacuum breaker acts to prevent contaminated water from siphoning back into the clean water supply. By effectively creating a physical barrier, it protects against potential contamination, which is a critical aspect of boiler operation and public health.

The other options, while important in the context of boiler systems, do not accurately describe the specific function of a pressure vacuum breaker. The device does not directly regulate pressure, monitor temperature, or enhance water quality; rather, its primary role is to safeguard against backflow, reinforcing the importance of safe and clean water usage within the boiler system.