What is the minimum size hose line recommended for a vehicle fire?

The recommended minimum size hose line for a vehicle fire is 38 mm (1 1/2 in). This size is generally considered adequate for delivering sufficient water flow and pressure to combat the typical combustion of materials found in vehicles, including plastics, upholstery, and fuel.

The larger diameter helps deliver a higher volume of water, which is crucial for overcoming the heat released by the burning materials in a vehicle fire. Additionally, the increased flow rate can aid in quicker knockdown of the flames, improving firefighter safety and effectiveness during operations. While smaller hoses can potentially be used for certain situations, they do not provide the same level of effectiveness or safety when addressing the hazards presented by vehicle fires, which often require a more robust attack strategy.