What is the purpose of the 2 firefighter stiff arm method?

The purpose of the two firefighter stiff arm method is specifically designed for undoing couplings. This technique allows two firefighters to effectively use their combined strength and leverage to safely separate two hose couplings that may be tightly connected, typically due to pressure or operational use in the field. The stiff arm method ensures that each firefighter maintains a good stance and utilizes their body mechanics to assist in the uncoupling process, minimizing the risk of injury and maintaining control over the hoses.

In contrast, the other options do not directly relate to the application of the two firefighter stiff arm method. Pulling hose from a reel typically requires other techniques that focus on deployment rather than uncoupling. Adjusting water pressure involves manipulating valves and gauges rather than employing a physical method between firefighters. Coiling hoses is a task focused on organization and storage of hoses, which again does not require the specific techniques applied in the stiff arm method for handling couplings.