Backflow Prevention Practice Exam

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A double check valve assembly can be utilized for which type of water system?

Potable water supply
Stormwater management
Irrigation systems
Non-potable industrial uses

The correct answer is: Potable water supply

A double check valve assembly is specifically designed to prevent backflow in a potable water supply system. This means it is essential for protecting the drinking water supply from potential contaminants that could enter the system through backflow. The double check valve assembly uses two check valves in series, which ensures that if one valve fails, the second valve will still provide a barrier to backflow, thus maintaining the safety and integrity of the potable water supply. While other water systems, such as stormwater management, irrigation systems, and non-potable industrial uses, may have their own specific backflow prevention measures, the double check valve assembly is particularly suited for applications involving potable water. This is due to its effectiveness in mitigating the risks associated with cross-connections that could introduce hazardous substances into drinking water lines, making it a crucial component in safeguarding public health.