What size lined hose must be installed into hose cabinets not exceeding 100 feet in length?

The correct choice for the size of lined hose that must be installed into hose cabinets not exceeding 100 feet in length is 1½ inch. This size is frequently specified in fire protection guidelines for standard hose cabinet configurations.

The rationale behind using 1½ inch lined hoses is that they strike a balance between adequate flow capacity and manageability. These hoses can efficiently deliver sufficient water flow for firefighting operations while remaining lightweight enough for easy handling by firefighters. This is particularly important in emergency situations where speed and efficiency can significantly impact the outcome.

Larger diameter hoses, such as 2 inches or 2½ inches, while offering greater water flow capacity, can be cumbersome and not as practical for quick deployment from hose cabinets. Smaller diameter hoses, like 1 inch, may not provide enough water flow for effective firefighting efforts in many scenarios. Therefore, 1½ inch hoses are commonly accepted as the standard for this specific application, ensuring firefighters have both adequate capacity and easy operability within the constraints of hose cabinets in buildings.