Initiating a nozzle change can be daunting task and is a topic that has a lot of opinion tied to it.
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In the well-read October 2007 Fire Engineering Article “How Kinks Affect Your Fire Attack System” Jerry Knapp along with Tim Pillsworth, Christopher Flatley, and Doug Leihbacher go into great detail how kinks affect your fire flows.
In this video Jerry Herbst reviews the points to consider when conducting your own nozzle evaluation.
Confirming proper pressure, pattern, and volume from your nozzle is an important part of initiating your fire attack.
Nozzle/Hose Whip is a term often used for erratic movement and kinking in smaller, 1.5 coupling hand lines at the nozzle position. Often referred to as a "nozzle weight" problem; hose construction and diameter inconsistencies are often the greatest variables.
Jerry Herbst discusses how "hose/nozzle" whip may surface in evaluation of attack line packages.