What is the typical GPM rating of a sprinkler head?

The typical GPM (gallons per minute) rating of a sprinkler head is commonly understood to be around 15 GPM at 15 psi. This standard flow rate is based on the operational characteristics designed for effective fire suppression. At this flow rate and pressure, the sprinkler heads are optimized to provide adequate coverage and effectiveness in extinguishing or controlling fires.

The 15 GPM figure is significant because it balances the need for sufficient water flow to combat typical fire loads while maintaining a manageable pressure that allows for the sprinkler system to operate efficiently. This standard enables fire protection engineers to design systems that effectively distribute water throughout a space, ensuring safety and compliance with fire codes.

When evaluating other options, the GPM ratings paired with their respective pressures do not reflect typical performance standards. The flow rates either exceed the norm given the pressures or present an imbalance that would either strain the system or fail to provide adequate suppression capability. Therefore, the selection of 15 GPM at 15 psi represents the widely accepted benchmark for sprinkler systems in fire protection practice.