Where must secondary drains drain?

Secondary drains are intended to serve as a backup system for primary drainage and are designed to prevent water from accumulating in spaces where it could cause damage or present safety hazards. The correct answer emphasizes the importance of discharging secondary drains in a conspicuous location. This is crucial because it ensures that any water being drained is easily observable, allowing for quick detection of issues such as leaks or blockages.

When secondary drains are visible, maintenance personnel or building occupants can promptly identify when the drainage system is active, prompting appropriate action if needed. A conspicuous location can help prevent water from pooling in unwanted areas, which might lead to more significant water damage or structural issues.

The alternative choices, while they may describe possible situations for drainage, do not prioritize the visibility and accessibility that is critical for effective monitoring and maintenance of drainage systems. This makes it essential to select a location that allows for easy observation to ensure the system functions as intended and that any problems can be addressed quickly.