Cross Connection Practice Exam

According to AWWA standards, what is the minimum vertical distance required from the bottom of an RP relief valve to the finished floor level?

1. 250 mm (10 inches)

2. 300 mm (12 inches)

3. 400 mm (16 inches)

4. 200 mm (8 inches)

The correct answer is: 300 mm (12 inches)

The AWWA standards specify that the minimum vertical distance from the bottom of a Reduced Pressure (RP) relief valve to the finished floor level is 300 mm (12 inches). This requirement is crucial for ensuring that any discharge from the relief valve can flow freely and not be obstructed by the floor or any other installed equipment. Maintaining this distance is important for preventing potential backflow conditions that could compromise the water supply's safety. It also guards against the accumulation of water or debris that could interfere with the valve's operation or cause contamination. Proper installation height contributes to the reliability and functionality of the RP device, ensuring it can efficiently discharge any excess pressure without creating hazards. In the context of other choices, although they may represent various potential distances, the specific requirement set by the AWWA for RP devices is 300 mm, aligning with recognized best practices and safety considerations in cross-connection control.