What is the minimum acceptable flow rate for interior structural fire attacks?

The minimum acceptable flow rate for interior structural fire attacks is 150 gallons per minute (gpm). This flow rate is considered effective for combating most structural fires, as it provides sufficient water to quickly suppress flames and cool hot gases. A flow rate of 150 gpm strikes a balance between adequate water supply and the ability to maneuver equipment effectively in an interior environment, ensuring firefighters can adequately protect themselves while also working to control the fire.

Firefighting tactics often emphasize the importance of flow rate in relation to the size of the fire. A flow rate of 150 gpm allows firefighters to take a proactive approach in extinguishing a fire early, which is crucial for both minimizing property damage and ensuring the safety of any occupants. Therefore, 150 gpm is seen as the minimum standard necessary to ensure effective fire control in structural firefighting scenarios. Higher rates may be necessary for larger or more intense fires, but this minimum is essential for most situations firefighters encounter.