What is the term used for the part of pressure that is used to overcome friction in the hose?

Friction loss is a critical concept in firefighting and hose management. It refers to the portion of the pressure in a fire hose that is used to overcome the resistance caused by the hose itself as water flows through it. This resistance can be influenced by several factors, including the length and diameter of the hose, the type of material the hose is made from, and the flow rate of the water.

When firefighters deploy hoses, they must account for friction loss to ensure that sufficient pressure is available at the nozzle to effectively combat a fire. The greater the friction loss, the more pressure the pumping system must provide at the source to maintain adequate flow and pressure at the end of the hose. Understanding and calculating friction loss is essential for ensuring effective water delivery during firefighting operations, enabling teams to operate safely and efficiently under pressure.