A tester notices a backflow preventer has been installed with flow direction opposite to the arrow on the body. Without testing, what must the tester record?
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A
Pass — the assembly may still prevent backflow in reverse
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B
Fail due to improper installation; the assembly cannot be tested or approved in this condition
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C
Inconclusive — test anyway and note the installation error
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D
No action needed if the building has no high-hazard uses