Which of these trades involves working with boilers?

The Boilermaker trade specifically involves working with boilers among other tasks related to the fabrication and repair of heavy metal structures. Boilermakers are skilled professionals who install, repair, and maintain large containers that hold liquids and gases, and this includes various types of boilers used in industries for generating steam or hot water.

In this trade, individuals are trained to handle the various components associated with boilers, such as piping, installation of parts, and ensuring that the systems operate safely and efficiently. The work may involve understanding complex systems that use steam or heat transfer, making knowledge of boilers essential.

While other trades like the Gas Utility Operator or Millwright may work with systems that could involve boilers in some capacity, their primary focus does not center exclusively on boilers or the specific skills involved in their maintenance and operation. The Elevator Constructor also does not deal with boilers directly; instead, this trade focuses on the installation and maintenance of elevators and lifts, which rely on different mechanics and systems. Thus, the Boilermaker is the clear choice for a trade that specializes in boiler work.