Plumber Red Seal · Question
Which of the following devices is primarily designed to prevent the backflow of non-potable liquids into a potable water supply system through a cross-connection, offering the highest level of protection against both backpressure and backsiphonage?
The Reduced Pressure Principle Backflow Preventer (RP) is designed with a relief valve that opens to atmosphere, providing the highest level of protection again
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Question: Which of the following devices is primarily designed to prevent the backflow of non-potable liquids into a potable water supply system through a cross-connection, offering the highest level of protection against both backpressure and backsiphonage?
Answer options: ✅ Reduced Pressure Principle Backflow Preventer (RP)
- Double Check Valve Assembly (DCVA)
- Pressure Vacuum Breaker Assembly (PVB)
- Atmospheric Vacuum Breaker (AVB)
Correct answer: Reduced Pressure Principle Backflow Preventer (RP)
Explanation: The Reduced Pressure Principle Backflow Preventer (RP) is designed with a relief valve that opens to atmosphere, providing the highest level of protection against both backpressure and backsiphonage, even if the check valves fail. DCVAs protect against backpressure but are not suitable for severe health hazards, while PVBs and AVBs only protect against backsiphonage.
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