Which statement about a double check valve backflow assembly is true?

• A. A double check valve is designed to stop backsiphonage of a health hazard
• B. It provides no protection against backflow
• C. It is the same as a reduced pressure principle backflow assembly
• D. A double check valve is not designed to stop backsiphonage of a health hazard

Answer: (D)

Double check valve assemblies provide backflow protection by using two check valves in series, which helps prevent backflow from non-health-hazard sources caused by backpressure or backsiphonage. However, they do not offer the higher level of protection required for contaminants that pose a health hazard. Therefore, they are not designed to stop backsiphonage of a health hazard. For protecting against health hazards, a device like a reduced pressure principle backflow assembly is used, which has additional features to maintain separation of contaminated water. The other statements aren’t correct because a DCV does provide backflow protection (against non-health-hazard threats), and it is not the same as an RP backflow assembly.