Standpipe 12 : The riser portion of the system piping that delivers the water supply for hose connections, and sprinklers on combined systems, vertically from floor to floor
NFPA 14 Standard for the Installation of Standpipe, Private Hydrant, and Hose Systems, 2000 ed. http://pozhproekt.ru/nsis/nfpa/NFPA14-2003.pdf, (Std: Instll of Stdpp, Prvt Hyd and Hose Sys - Amer) {182 NFC}