What is the minimum required water pressure for the effective operation of a sprinkler system?

The minimum required water pressure for the effective operation of a sprinkler system is 15 PSI. This pressure is essential to ensure that the sprinkler heads can distribute water adequately and at the appropriate velocity to effectively suppress or control a fire. At lower pressures, such as 5 PSI or 10 PSI, the system may not be able to achieve the required flow rate needed to cover the designated area effectively, leading to potential gaps in fire protection. Pressure is crucial because it influences both the reach and the pattern of water distribution, which are vital factors for effective fire protection strategies in any building or structure. The standard of 15 PSI is aligned with guidelines and regulations found in various fire safety codes, ensuring sprinkler systems operate efficiently and safely under emergency conditions.