Improper use or lack of backflow preventers may create which issue?

• A. Increased water pressure
• B. Contamination
• C. Low water pressure
• D. Fluctuating water pressure

Answer: (B)

Backflow prevention protects the drinking water system by stopping reverse flow into the supply when pressure in the distribution network changes. If backflow preventers aren’t used where required or aren’t maintained, water from non-potable sources—like irrigation systems, processing lines, or wastewater—can be drawn back into the potable supply through cross-connections. This backflow can carry contaminants into the water people drink and use, posing health risks. The risk is especially higher during conditions that cause back-siphonage or backpressure. So improper use or absence of backflow prevention leads to contamination of the water supply, rather than simply changing pressure.