What is the maximum size system allowed with a single FDC outlet?

The maximum size of a system allowed with a single Fire Department Connection (FDC) outlet is typically 3 inches. This specification is rooted in safety and hydraulic considerations, ensuring that the connection provides an adequate amount of water flow for firefighting while remaining accessible and manageable for fire personnel.

Having an outlet size larger than 3 inches would typically require additional FDC outlets to accommodate the increased flow without risking operational challenges during an emergency response. By maintaining the maximum size at 3 inches, it ensures that firefighters can quickly connect their hoses and achieve optimal performance under pressure, delivering the necessary water flow to combat fires efficiently.

Understanding this specification is crucial for compliance with fire codes and ensures the preparedness of sprinkler systems in emergency situations.