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Water supply

A loft tank in the house is connected to the outdoor pool on the hillside. If the pool elevation is higher than the supply tank, dirty water will be siphoned down to the house. What means can prevent the potential contamination of a potable water system?

A. reduced principle assembly (RP)
B. air gap
C. double check valve assembly (DC)
D. pressure vacuum breaker (PVB)
E. none of the above
F. all of the above
AnswerF. all of the above - are backflow prevention methods, but in this case a mechanical backflow preventer is the proper mechanism required. A/C/D are principal types of backflow prevention devices.
ARE 4.0 exam prep: BS

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