Drain 6 : Sectional Drain: A drain located beyond a sectional control valve that drains only a portion of the system (e. g. , a drain located beyond a floor control valve on a multi-story building)
NFPA 25 Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, 2008 ed. https://law.resource.org/pub/us/cfr/ibr/004/nfpa.2 5.2002.pdf, (Std: Insp, Testing, and Maint of Wtr-Based Fr Prac Sys - Amer) {191 NFC}