Pressure Drop 1 : A loss inpressure due to leakage, friction, change in elevation, or obstructions in pipe, valves, hose, or fittings. See: Pressure Loss, Friction Loss
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}