True or False: You need a fitting to repair a steel pipe, which can be determined by finding the diameter of the main.

When determining whether a fitting is needed to repair a steel pipe, the diameter of the main is indeed a critical factor. A fitting is often required for various types of repairs or modifications in pipeline systems, especially when sections of the pipe need to be replaced or when connecting different pipe sizes or types.

For steel pipes, knowing the diameter helps in selecting the appropriate fitting that will accommodate the flow requirements and maintain the integrity of the system. This is essential not just for ensuring proper fit but also for minimizing leaks and maintaining the pressure within the pipeline system.

Using a fitting that matches the diameter of the main pipe is crucial in these scenarios. It ensures that the flow is not restricted and that the system operates efficiently without any pressure drops that could lead to further complications. Thus, it’s accurate to state that a fitting is needed to repair a steel pipe based on the diameter of the main.