What is the required pressure for class 1 and 2 standpipes?

The required pressure for Class 1 and Class 2 standpipes is set to ensure that the system can deliver sufficient water flow to effectively combat a fire. The correct answer specifies a pressure of 100 psi for 30 minutes, which aligns with the standards established by fire codes to guarantee adequate performance during an emergency.

In the context of firefighting, this pressure and duration ensure that sufficient water is available, allowing firefighters to manage the fire effectively. Maintaining a reliable flow at this pressure level is essential, as it helps to maximize the reach and effectiveness of the water being deployed from the standpipe system.

This requirement is established by national standards, which dictate that effective fire suppression systems must be able to deliver these specified pressures over a designated period to ensure safety and efficacy during fire events. Organizations like the National Fire Protection Association (NFPA) have detailed these specifications to create uniformity across various jurisdictions and ensure that all buildings have access to reliable fire protection measures.

It is also important to note that while the other options specify different pressure levels and durations, they do not meet the criteria defined by the regulatory standards for Class 1 and Class 2 standpipes. This reinforces why 100 psi for 30 minutes is the recognized standard for effective fire response