What is the minimum pressure rating required for all piping and fittings used in private fire service mains?

The minimum pressure rating required for all piping and fittings used in private fire service mains is established to ensure reliability and safety in fire protection systems. A pressure rating of 150 PSI is designated because it accommodates the normal operating pressures and any potential surges or fluctuations that may occur within the system. This rating is essential to maintain the integrity of the piping under various operational conditions, including those that arise during fire suppression activities or system maintenance.

By adhering to this 150 PSI minimum requirement, the system is better protected against failures that could arise from pressures exceeding what the components are designed to handle, thereby ensuring the effective operation of fire service mains when needed.