Plumbers install, alter, and repair residential or industrial plumbing systems. They measure, cut, shape, and join pipes according to project specifications. They must also prevent and repair leaks. Plumbers work with many different pipe materials such as iron, steel, lead, copper, plastic, glass, or cement. Some plumbers specialize in self-contained systems, such as septic tanks.
Steamfitters work on heating or cooling pipe systems or process systems. They also work on industrial systems that convey gases, employ pneumatic tubing, involve air handling, and form the infrastructure of oil refineries and nuclear power plants. This work includes assembly, installation, maintenance, and repair.
Sprinkler and fire protection installers work with high-pressure and low-pressure pipeline systems carrying water, foam, gas, or air. Their work includes installing, repairing, maintaining, and testing sprinkler systems. They can work in residential or commercial environments, but this work is especially important for fire control systems.