Cross Connection Practice Exam

What is a potential risk associated with neglecting proper installation of backflow preventers?

1. Water bill increase

2. Cross-contamination of drinking water

3. Piping corrosion

4. System inefficiency

The correct answer is: Cross-contamination of drinking water

Neglecting proper installation of backflow preventers poses a significant risk of cross-contamination of drinking water. Backflow preventers are vital components that ensure water flows in the intended direction and prevent contaminated water from entering the potable water supply. When these devices are improperly installed, they can fail to function correctly, allowing harmful bacteria, chemicals, or other pollutants from external sources to backflow into the clean water supply. This can lead to serious health issues for consumers and violate public health regulations. The other choices, while potentially relevant to various plumbing issues, do not directly capture the primary public health risk associated with inadequate backflow prevention. For instance, while an increase in water bills could result from leaks or inefficiencies, it does not convey the immediate danger to health that cross-contamination represents. Piping corrosion and system inefficiency can occur from different plumbing problems but are secondary concerns compared to the critical need for clean, safe drinking water. Therefore, the emphasis on cross-contamination highlights the essential role of properly installed backflow preventers in safeguarding public health.