Cross Connection Practice Exam

What is the purpose of the bypass line on a double detector check valve assembly?

1. Provide secondary water supply

2. Detect unauthorized usage of water

3. Reduce pressure of incoming water

4. Prevent backflow entirely

The correct answer is: Detect unauthorized usage of water

The purpose of the bypass line on a double detector check valve assembly is to serve as a mechanism for monitoring and detecting unauthorized usage of water. In essence, the bypass line allows a small amount of water to flow through a separate path to help ensure that all potential backflow events can be monitored while still maintaining the primary operation of the double detector check valve. This configuration is particularly important in maintaining water safety and regulatory compliance, as it allows for the detection of any irregularities in the flow that might indicate improper usage or potential leaks. By facilitating this monitoring without impacting the overall flow of the water supply or introducing additional pressure concerns, the bypass line plays a critical role in safeguarding the water system from contamination. While the other options may relate to different aspects of water supply management, they do not accurately describe the specific function of the bypass line in this context.