Break a Line 1 : (1) To disconnect a coup-ling in a hose line in order to attach a nozzle or fitting. (2) To disconnect a hose line along its length. See also: Break a Coupling
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}