What percentage of its rated capability must a fire pump produce at 200 psi to meet UL standards?

To meet Underwriters Laboratories (UL) standards, a fire pump must produce at least 70% of its rated capability at a discharge pressure of 200 psi. This requirement ensures that the pump can deliver adequate performance under pressure conditions that are necessary for effective firefighting operations. The test is designed to confirm that the pump maintains a sufficient flow rate while operating at a specific pressure, reflecting its reliability and efficiency during actual emergency scenarios.

The 70% threshold is critical for establishing the performance expectations for fire pumps, ensuring that they can generate the necessary water flow and pressure needed to effectively combat fires and safeguard lives and property. Understanding this standard is essential for compliance with safety regulations and for ensuring that fire pumping systems are adequately rated and can perform as needed during emergencies.