True or False: Reduced pressure models are the most reliable backflow prevention devices.

• A. True
• B. False
• C. Only in low-pressure systems
• D. It depends on the installation

Answer: (A)

Reduced pressure models are considered one of the most reliable backflow prevention devices due to their design and functionality. These devices use two independently acting check valves with a pressure differential relief valve located between them. This configuration allows them to effectively prevent backflow, ensuring that contaminated water does not flow back into the potable water supply.

In scenarios where backflow might occur due to pressure changes — such as when there is a sudden drop in system pressure or during events like firefighting — reduced pressure models maintain their effectiveness by allowing for the release of any backflow pressure through the relief valve, thereby creating a reliable system for maintaining water quality.

While other backflow prevention devices exist, reduced pressure models are particularly effective in environments where the risk of contamination is high, making them the best choice for critical applications, such as irrigation systems in landscape management. The consideration of installation and operational conditions, as raised in some of the other options, may affect overall performance but does not detract from the reliability of the device itself when properly installed.