How are standpipes related to fire hydrant systems?

• A. Standpipes may connect to municipal hydrants or building standpipes to supply water
• B. Standpipes replace hydrants entirely
• C. Hydrants only connect to water mains
• D. Standpipes are separate from firefighting water supply

Answer: (A)

Standpipes are the inside distribution points of a fire protection water supply. They provide hose outlets on multiple floors so firefighters can reach water quickly where a fire is progressing. To work, they must be fed from a water source, which can be the public hydrant system or the building’s own water supply or pump system. That’s why standpipes are described as connecting to municipal hydrants or to the building’s water supply—the standpipe itself is just the internal conduit that carries water to the outlets, not a separate, standalone source. Hydrants remain external sources of water, and standpipes help bring that water to where it’s needed inside the building. The other statements misstate the relationship by implying standpipes replace hydrants, or that hydrants only connect to mains, or that standpipes are separate from the firefighting water system.