Which of the following is NOT a reason for backflow prevention failure?

Frequent maintenance checks are an essential part of ensuring the reliability and functionality of backflow prevention devices. Regular maintenance helps identify potential issues before they lead to failure, such as wear or the need for adjustments. This proactive approach minimizes the risk of backflow incidents. In contrast, wear and tear from regular use, incorrect closing of check valves, and improper installation are all factors that can lead to backflow prevention failure. By understanding that maintenance enhances the performance of backflow prevention systems, it becomes clear why frequent maintenance is not a reason for failure, but rather a best practice to prevent it.