§ 13.12.170. Vacuum breakers

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Atmospheric vacuum breakers shall be installed with the critical level at least six inches above the flood rim of the fixture they serve and on the discharge side of the last control valve to the fixture. No shutoff valve or faucet shall be installed beyond the atmospheric vacuum breaker. Pressure vacuum breakers shall be installed with the critical level at least twelve (12) inches above the flood rim but may have control valves downstream from the vacuum breaker. For closed equipment or vessels such as pressure sterilizers, the top of the vessel shall be considered the flood level rim and a check valve shall be installed on the discharge side of the pressure vacuum breaker.

(Ord. 8909 § 4(e), 1989)

                    
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