What size hose is typically used for the S type?

The S type hose is most commonly associated with a 2.5-inch diameter. This size is often used in various fire protection applications, including firefighting, due to its balance of flexibility and flow capacity. A 2.5-inch hose allows for sufficient water flow to combat fires effectively while still being manageable for firefighters to handle. Additionally, this size is standard across many fire service organizations, making it compatible with various equipment and ensuring interoperability between different departments and units. The use of a 2.5-inch hose can also accommodate a significant pressure range, making it suitable for both initial attack and supply lines.