What is the water flow rate for Class 1 and Class 3 standpipes?

The specified water flow rate for Class 1 and Class 3 standpipes is 250 gpm at 100 psi. This flow rate is crucial for effectively combating fire in high-rise buildings and structures where these standpipes are typically utilized. Class 1 standpipes are designed primarily for fire department use, allowing firefighters to connect hoses directly and access water quickly while maintaining sufficient pressure. Class 3 standpipes serve both fire service and occupant use, providing a reliable water supply with adequate flow for firefighting operations and life safety systems.

A flow rate of 250 gpm at 100 psi ensures that there is ample water available to suppress fires, contributing to overall fire safety and effectiveness in emergency situations. This standard aligns with established fire protection codes to ensure that resources are optimally available for fire service professionals when responding to incidents. Understanding these requirements helps in planning and training for firefighting strategies in various building types.