Backflow Prevention Practice Exam

The function of the check valve 2 in a reduced pressure principle assembly is primarily to ____?

1. Prevent flow in the reverse direction

2. Maintain relief valve pressure

3. Ensure water is always flowing

4. Relieve excess pressure

The correct answer is: Prevent flow in the reverse direction

The function of check valve 2 in a reduced pressure principle assembly is primarily to prevent flow in the reverse direction. This is crucial in maintaining the integrity of the water supply system, especially in preventing contamination from backflow. In a reduced pressure zone design, the check valves work to ensure that water flows in only one direction – from the source to the destination – thereby blocking any reverse flow that could introduce contaminants into the potable water supply. This function helps protect public health and guarantees that the water delivered remains safe and uncontaminated. Understanding the role of the check valve clarifies its importance in backflow prevention systems. Its design and placement are purposefully aimed at enhancing the overall effectiveness of the system to prevent backpressure or backflow conditions. This is integral to the operational safety of plumbing and water distribution systems.