Cross Connection Practice Exam

A Full Flow Through fire sprinkler system would require what type of backflow protection?

1. No protection would be required

2. Reduced Pressure Principle Assembly

3. Double Detection Check Valve

4. Atmospheric Vacuum Breaker

The correct answer is: No protection would be required

A Full Flow Through fire sprinkler system requires no backflow protection because these systems are typically considered as non-potable water systems. Fire sprinkler systems draw water directly from the municipal supply or from dedicated sources, and they are designed to discharge a significant volume of water under high pressure to suppress fires. The absence of backflow protection is based on the operational context of fire sprinkler systems, which are constantly monitored and maintained to prevent contamination of the potable water supply. Regulations and guidelines from organizations such as the American Water Works Association (AWWA) and the National Fire Protection Association (NFPA) dictate that certain conditions permit these systems to operate without the need for additional backflow devices, as the risk of contamination is minimal when proper procedures are followed.