What is the minimum protection required for containment protection in a non-health hazard situation?

In a non-health hazard situation, the minimum protection required for containment is a double check backflow prevention assembly. This type of assembly is designed to prevent the backflow of non-health hazards into the public water supply. A double check assembly consists of two independently acting check valves that provide redundancy and enhance reliability in preventing backflow.

Using a double check backflow prevention assembly is adequate because non-health hazards, such as pesticides or fertilizers, pose less risk than health hazards like sewage or toxic chemicals. Therefore, the double check assembly is suitable for safeguarding the potable water supply while not being as elaborate or strict as the requirements for health hazards.

Other options like atmospheric vacuum breakers and reduced pressure principle assemblies offer varying levels of protection but are not classified as the minimum necessary for non-health hazard situations. An atmospheric vacuum breaker, for example, is more suited for specific applications like irrigation systems where back siphonage is a potential issue. The reduced pressure principle assembly provides a higher level of protection suitable for health hazard situations. Lastly, a single check valve does not provide adequate protection, as it lacks redundancy, making it unsuitable for even non-health hazards.