Sample interview questions: Can you explain your understanding of cross-connection control and prevention?
Sample answer:
Cross-connection control and prevention is a crucial aspect of plumbing that ensures the safety and purity of our water supply. As a Journeyman Plumber, I have a comprehensive understanding of this important topic.
Cross-connections occur when there is a connection between the potable water system (drinking water) and a non-potable source (contaminated water or substances). This connection can lead to the backflow of contaminants or pollutants into the clean water supply, posing serious health risks to consumers.
To prevent such backflow incidents, it is essential to implement effective cross-connection control measures. These measures typically involve the installation of backflow prevention devices, which are specially designed to prevent the reverse flow of water from entering the potable water system.
There are different types of backflow prevention devices, each suitable for specific applications. These devices include:
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Atmospheric Vacuum Breakers (AVBs): These devices are commonly used in residential settings and are relatively simple in design. AVBs prevent backflow by allowing air to enter the plumbing system when a negative pressure situation occurs, thus preventing any potential contamination.
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Pressure Vacuum Breakers (PVBs): PVBs are often used in commercial and industrial settings. They consist of a valve that opens to allow air into the plumbing system when a pressure drop is detected, preventing backflow.
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Reduced Pressure Zone (RPZ) Assemblies: RPZ assemblies are highly reliable and are typically used in high-risk scenarios, such as industrial facilities. These devices have tw… Read full answer
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