Zones System : A sprinkler system in which service to different areas in the building is controlled by separate valves, in contrast to a single system that serves the entire building as a unit
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}