Water Supply & DistributionQuestion 14 of 360
A double check valve assembly (DC) is being selected for a cross-connection. Which application is appropriate for a DC assembly?
a.A high (health) hazard with chemical contamination
b.A low-hazard (non-health) cross-connection, including backpressure situations
c.Any hazard as long as an air gap is impossible
d.A back-siphonage-only application where an AVB is cheaper
Explanation
A double check assembly protects against both back-siphonage and backpressure but only for low-hazard (non-health) cross-connections. It is not rated for a high (health) hazard, which requires an RP assembly or air gap, so the other options misapply the device.
Law Reference: 2022 California Plumbing Code (CPC) §603.0Practice all 360 questions free — no signup required.
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