Which construction professional is responsible for the installation and repair of mechanical piping systems?

The professional responsible for the installation and repair of mechanical piping systems is a pipefitter. Pipefitters specialize in working with various types of piping systems used for transporting gases, liquids, and sometimes solids, and are skilled in the installation, maintenance, and repair of these systems. They have a comprehensive understanding of piping materials, including metals and plastics, and the tools and techniques required to join them, often utilizing methods such as welding, soldering, and threading.

In contrast, carpenters focus primarily on the construction and installation of wooden structures and framework, electricians specialize in wiring and electrical systems, and welders work with joining metal components together, often in a manufacturing or construction setting, but are not specifically trained for the full range of work associated with piping systems. This specialized knowledge and skill set is what distinctly qualifies pipefitters for their role in mechanical piping systems.