Cross Connection Practice Exam

What type of service protection is required on a single family dwelling?

1. Backflow preventer

2. Double Check Valve Assembly

3. No protection is required

4. Reduced Pressure Backflow Assembly

The correct answer is: No protection is required

In most cases, the requirement for service protection on a single-family dwelling can vary based on local plumbing codes and specific conditions related to the water supply. In many areas, single-family residences do not require backflow protection unless there are specific hazards present that could contaminate the potable water supply. Having no protection required is generally the standard unless there are specific risk factors associated with the dwelling, such as connections to irrigation systems, swimming pools, or other potential cross-connections that could pose a risk of contamination. For standard residential usage without these additional hazards, the water system is typically considered to have a low enough risk that formal backflow prevention measures aren’t mandated. While other options like the backflow preventer, double check valve assembly, and reduced pressure backflow assembly are essential in situations where there are higher risks of contamination, their application is usually reserved for commercial settings or residences with specific hazards, rather than standard single-family homes without complex plumbing scenarios. Therefore, in the absence of any identified hazards, it is appropriate to conclude that no protection is required for a single-family dwelling.