Water Supply & DistributionQuestion 44 of 120
A fire sprinkler system with no antifreeze or chemical additives is connected to the potable water supply under continuous pressure. Which assembly is the appropriate minimum protection for this low hazard connection?
a.Atmospheric vacuum breaker
b.Pressure vacuum breaker
c.Reduced pressure principle assembly
d.Double check valve assembly
Explanation
A non-additive sprinkler system is a low hazard (pollutant, not contaminant) connection under continuous pressure, which is the exact application for a double check valve assembly. A reduced pressure assembly exceeds the minimum required here and adds an unnecessary relief discharge. An atmospheric vacuum breaker may never be used under continuous pressure, and a pressure vacuum breaker protects against back-siphonage only, not back-pressure.
Law Reference: IPC §608.13Practice all 120 questions free — no signup required.
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