What is the nominal size of the automatic relief valve on a fire pump with a rated capacity not exceeding 2500 gpm?

The nominal size of the automatic relief valve on a fire pump with a rated capacity not exceeding 2500 gpm is typically 1 inch. This specification is crucial for ensuring that the fire pump operates efficiently while maintaining system integrity. The relief valve's size is designed to manage excess pressure and allow for proper flow, which in turn protects the pump from potential damage due to overpressure conditions.

In systems where the fire pump capacity does not exceed 2500 gpm, a 1-inch automatic relief valve is sufficient to handle the operational demands without compromising safety. This helps ensure that the pump can maintain optimal performance during firefighting operations, enabling it to maintain the necessary pressure and flow rates required for effective fire suppression. The other sizes mentioned do not correspond to the standard requirements for automatic relief valves on such fire pumps, illustrating the importance of adhering to established guidelines within fire protection engineering.