What diameter is the hose found at the firefighting stations?

The diameter of the hose commonly found at firefighting stations is indeed 1.5 inches. This size is standard for many firefighting operations as it strikes a balance between being manageable for firefighters to handle while still allowing for an adequate flow of water necessary to combat fires effectively. The 1.5-inch hoses are often used for handlines, which are the hoses that firefighting personnel carry and operate themselves to direct water at the fire.

Other sizes, such as 1 inch, may be used for specialized applications or in specific equipment but are not the standard for fire stations. Larger diameters, like 2 inches and 2.5 inches, are typically used for supply lines or in larger operations where higher flow rates are necessary, but the most common hose found at a standard firefighting station for general use is the 1.5-inch diameter. This makes it an efficient choice for most fire suppression needs.