What distinguishes a Master Plumber from a Journeyman Plumber?

A Master Plumber is distinguished from a Journeyman Plumber primarily by the level of supervision required. A Master Plumber is a licensed professional who has completed extensive training and gained significant experience in the plumbing field. This level of expertise allows them to work independently without the need for direct supervision from another licensed plumber.

In contrast, a Journeyman Plumber typically operates under the oversight of a Master Plumber as they continue to build their skills and knowledge in the trade. The differences in their roles emphasize the Master Plumber's ability to take on more complex projects, manage plumbing systems, and ensure compliance with building codes and safety regulations on their own.

The other options presented may include specific aspects regarding types of work or experience, but they do not accurately represent the core difference in supervision requirements, which is the defining characteristic that sets apart a Master Plumber from a Journeyman Plumber.