Backflow Prevention Practice Exam

Atmospheric vacuum breakers will typically be located on ____?

1. Commercial irrigation systems

2. Fire-suppression systems

3. Plumbing fixtures or appliances

4. Utility storage tanks

The correct answer is: Plumbing fixtures or appliances

Atmospheric vacuum breakers are designed to prevent backflow in systems where water pressure can fluctuate, which can cause contaminated water to flow back into the clean water supply. They work by allowing air to enter a system when there is a drop in water pressure, thus breaking the vacuum that could potentially draw contaminants into the potable water flow. These devices are commonly used in plumbing fixtures or appliances, particularly in locations like sinks, toilets, and irrigation systems where there may be a risk of siphonage. Their installation in plumbing fixtures is crucial, as these areas are more likely to experience changes in water flow that could create vacuum conditions. While atmospheric vacuum breakers can also be relevant to other systems, such as commercial irrigation systems, fire-suppression systems, and utility storage tanks, they are most typically associated with individual plumbing fixtures due to their specific function of protecting the potable water supply in residential and commercial settings.