Sample interview questions: Can you explain the difference between backflow prevention and cross-connection control?
Sample answer:
Backflow Prevention vs. Cross-Connection Control
Backflow prevention and cross-connection control are distinct but related concepts in plumbing.
Backflow Prevention:
- Focuses on preventing the flow of contaminated water back into the potable water supply.
- Achieved through the installation of backflow prevention devices (BPDs), such as check valves, vacuum breakers, or reduced-pressure zone assemblies.
- Protects against potential contamination from sources such as irrigation systems, industrial processes, or fire sprinkler systems.
Cross-Connection Control:
- Aims to eliminate physical connections between potable water sources and potential sources of contamination.
- Involves the implementation of policies, procedures, and physical barriers to prevent the establishment of cross-connections.
- Examples include air gaps, backflow preventers, and dedicated non-potable wate… Read full answer
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