What is the primary function of a fire standpipe system in a multi-story building?

• A. Manage building drainage and sewer systems.
• B. Supply potable water for daily occupancy.
• C. Provide a readily accessible water supply for firefighting and suppression throughout the building.
• D. Provide structural support for stairwells.

Answer: (C)

The main idea here is to have a reliable water source inside the building that is easy to reach for firefighting. In a multi-story structure, fires can occur on any floor, so having standpipes provides water outlets at accessible locations on each level, allowing firefighters or trained occupants to quickly attach hoses and deliver water where the fire is. Standpipes are connected to the building’s water supply and may be served by pumps to maintain sufficient pressure, ensuring a steady flow through the outlets on different floors. They’re specifically for firefighting and suppression, not for daily drinking water, sewer or drainage, or structural purposes. That readiness and targeting of water for fire control is what makes the standpipe’s primary function.