Water Supply & DistributionQuestion 5 of 360
An atmospheric vacuum breaker (AVB) is installed to protect a hose connection. What installation condition must be satisfied for an AVB to be used correctly?
a.It must be installed at least 6 inches above the highest downstream outlet or flood-level rim and never under continuous pressure
b.It may be installed below the flood-level rim
c.It may remain pressurized more than 12 hours continuously
d.It protects against backpressure
Explanation
An AVB must be installed a minimum of 6 inches above the flood-level rim or highest downstream outlet and cannot be under continuous pressure (more than 12 hours). It offers no backpressure protection and cannot be located below the flood-level rim, so those options are incorrect.
Law Reference: 2022 California Plumbing Code (CPC) §603.0Practice all 360 questions free — no signup required.
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