Plumber Red Seal · Question
A large industrial facility uses a chemical mixing system that can, under certain fault conditions, create a back-siphonage risk for the potable water supply. What type of backflow prevention device offers the highest level of protection against both back-pressure and back-siphonage in this high hazard application?
For high hazard situations involving potential chemical contamination and both back-pressure/back-siphonage risks, a Reduced Pressure Principle Backflow Prevent
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Question: A large industrial facility uses a chemical mixing system that can, under certain fault conditions, create a back-siphonage risk for the potable water supply. What type of backflow prevention device offers the highest level of protection against both back-pressure and back-siphonage in this high hazard application?
Answer options:
- Double Check Valve Assembly (DCVA)
- Pressure Vacuum Breaker (PVB) ✅ Reduced Pressure Principle Backflow Preventer (RPBA)
- Atmospheric Vacuum Breaker (AVB)
Correct answer: Reduced Pressure Principle Backflow Preventer (RPBA)
Explanation: For high hazard situations involving potential chemical contamination and both back-pressure/back-siphonage risks, a Reduced Pressure Principle Backflow Preventer (RPBA) is required. It provides the highest level of protection by incorporating a relief valve that opens to atmosphere when the pressure differential drops, effectively preventing backflow.
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