Backflow Prevention Practice Exam

A reduced pressure principle assembly check valve number 1 is field-tested _____?

1. In the direction of flow only

2. Under backpressure

3. Under backsiphonage

4. Under backpressure and backsiphonage

The correct answer is: Under backpressure and backsiphonage

The correct answer is that a reduced pressure principle assembly check valve number 1 is field-tested under both backpressure and backsiphonage. This is essential because the reduced pressure principle assembly is designed to prevent the backflow of contaminated water into the potable water supply under varying conditions. Field testing under backpressure ensures that the valve can properly hold back pressure from downstream sources, which could pose a risk of backflow if not properly managed. Additionally, testing under backsiphonage simulates scenarios where there may be a drop in pressure in the supply system causing a siphoning effect that could draw contaminants back through the valve. By requiring testing under both conditions, it guarantees that the entire assembly functions correctly in real-world situations where backflow risks may arise. This comprehensive testing helps ensure the safety and reliability of drinking water systems, making it a critical part of maintaining public health and safety.