Sample interview questions: Can you explain what backflow is and why it is a concern in plumbing systems?
Sample answer:
Backflow Definition:
Backflow occurs when water flows in the reverse direction of its intended path in a plumbing system. This can happen due to pressure imbalances, water main breaks, or cross-connections between potable and non-potable water sources.
Reasons for Concern:
Backflow is a significant concern in plumbing systems for several reasons:
- Contamination of Potable Water: Backflow can introduce contaminants, pathogens, and pollutants from non-potable sources into the potable water supply. This can pose health risks to consumers and lead to waterborne illness outbreaks.
- Damage to Plumbing Fixtures and Appliances: Backflow can exert excessive pressure on plumbing fixtures and appliances, causing them to malfunction or even burst. This can result in costly repairs and water damage.
- Cross-Connection Risks: Backflow incidents can create cross-connections between potable and contaminated water sources. These cross-connections can allow contaminants to enter the potable water distribution system, potentially causing widespread health hazards.
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