BACKFLOW CERTIFICATION TEST PAPER
2026 QUESTIONS AND SOLUTIONS
GRADED A+ COMPLETE
●● What are the two types of backflow?
Answer: Backpressure and backsiphonage.
●● What causes backsiphonage?
Answer: Negative pressure in the supply line.
●● Which device provides the highest level of protection?
Answer: Reduced Pressure Zone (RPZ) Assembly.
●● Where is a Double Check Valve Assembly (DCVA) used?
Answer: Low hazard (non-health hazard) systems.
●● A Pressure Vacuum Breaker (PVB) protects against what?
Answer: Backsiphonage only.
●● What is a cross-connection?
Answer: A connection between potable and non-potable systems.
2026 QUESTIONS AND SOLUTIONS
GRADED A+ COMPLETE
●● What are the two types of backflow?
Answer: Backpressure and backsiphonage.
●● What causes backsiphonage?
Answer: Negative pressure in the supply line.
●● Which device provides the highest level of protection?
Answer: Reduced Pressure Zone (RPZ) Assembly.
●● Where is a Double Check Valve Assembly (DCVA) used?
Answer: Low hazard (non-health hazard) systems.
●● A Pressure Vacuum Breaker (PVB) protects against what?
Answer: Backsiphonage only.
●● What is a cross-connection?
Answer: A connection between potable and non-potable systems.
