Water Supply & DistributionQuestion 43 of 360
A dedicated fire sprinkler system without antifreeze or chemical additives is connected to the potable main. Which backflow protection is generally the minimum appropriate for this typically low-hazard connection?
a.No protection
b.An atmospheric vacuum breaker
c.A double check valve assembly (DC)
d.A hose bibb vacuum breaker
Explanation
A fire system without chemicals or antifreeze is typically a low hazard, and the standing water in the system justifies at least a double check valve assembly for premise isolation. No protection is unacceptable, an AVB cannot be under continuous pressure, and a hose bibb vacuum breaker is not a system-isolation assembly.
Law Reference: 2022 California Plumbing Code (CPC) §603.0Practice all 360 questions free — no signup required.
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