How does NFPA 13E define standpipes in existing buildings?

• A. Standpipes are vertical piping systems with hose connections designed to deliver water for firefighting within a building, with classifications such as Class I, II, and III
• B. Standpipes are external hoses connected to water mains outside the building
• C. Standpipes are only for sprinklers above ceilings
• D. Standpipes are solely used to supply water to hydrants on the street

Answer: (A)

Standpipes in existing buildings are vertical piping systems located inside the structure that provide a water supply to firefighting personnel through hose connections. They’re designed to deliver water for interior fire operations, not just for sprinklers or external uses. NFPA 13E defines classifications for these standpipes to cover different needs: Class I outlets are 2-1/2 inches and intended for use by firefighters with hoses attached; Class II outlets are 1-1/2 inches with preconnected hoses for occupant use; Class III combines both types at certain outlets so either occupants or firefighters can access water. This internal setup is distinct from hoses or hydrants outside the building connected to municipal mains or street hydrants, and it isn’t limited to sprinkler head coverage alone.