If the hydraulically most remote outlet on a standpipe system is not accessible, where shall the flow test be performed?

• A. At a location determined by the Authority Having Jurisdiction
• B. At the low point drain.
• C. At the most convenient site determined by the owner.
• D. At the next low hose outlet

Answer: (A)

When testing a standpipe, the key is to confirm adequate flow and pressure at the hydraulically most remote outlet. If that outlet isn’t accessible, the appropriate approach is to have the Authority Having Jurisdiction designate where the flow test should be performed. This ensures the test still validates the system under worst-case conditions and in a way that meets code and safety requirements.

Choosing a test location based on accessibility or convenience, such as a low point drain or a nearby outlet, could misrepresent the system’s true hydraulics and fail to verify performance at the remote point. The owner’s preference for a convenient site isn’t appropriate for critical testing points, and the AHJ's designation provides the authoritative, compliant solution.