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Plumbing
Plumbing Journeyman License
Backflow Prevention & Cross-Connection Control
Knowledge Check
Backflow Prevention & Cross-Connection Control
Knowledge Check
Knowledge Check
1 / 8
Why is an air gap considered more reliable than any mechanical backflow prevention device?
A
It uses higher water pressure to prevent reverse flow
B
It provides a complete physical disconnect with no mechanical parts that can fail
C
It is tested more frequently than other devices
D
It includes redundant check valves
Check Answer
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