Cross Connection Practice Exam

Which backflow condition is associated with a sudden drop in water pressure?

1. Backpressure

2. Backsiphonage

3. Cross-Connection

4. Pressure Deficiency

The correct answer is: Backsiphonage

Backsiphonage is a backflow condition that occurs when there is a sudden drop in water pressure in the supply system, which can create a vacuum or negative pressure. This situation often arises when there is a break in the water main, a high demand for water in the system (like during firefighting or heavy draw), or when a service connection is disrupted. When this pressure drop happens, it can cause water from a contaminated source to be drawn back into the clean water system. This is particularly concerning because it can lead to the contamination of safe drinking water. Understanding this mechanism is crucial for implementing appropriate measures to prevent cross-connections and ensure that the potable water supply remains safe and uncontaminated.