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Industries & Professions /
Plumbers and Pipefitters
Because little difference exists between the work of the plumber and the pipefitter in most cases, the two are often considered to be one trade. However, some craftsworkers specialize in one field or the other, especially in large cities.
The work of pipefitters differs from that of plumbers mainly in its location and the variety and size of pipes used. Plumbers work primarily in residential and commercial buildings, whereas pipefitters are generally employed by large industrial concerns—such as oil refineries, refrigeration plants, and defense establishments—where more complex systems of piping are used. Plumbers assemble, install, and repair heating, water, and drainage systems, especially those that must be connected to public utilities systems. Some of their jobs include replacing burst pipes and installing and repairing sinks, bathtubs, water heaters, hot water tanks, garbage disposal units, dishwashers, and water softeners. Plumbers may also work on septic tanks, cesspools, and sewers. During the final construction stages of both commercial and residential buildings, plumbers install heating and air-conditioning units and connect radiators, water heaters, and plumbing fixtures.
Most plumbers follow set procedures in their work. After inspecting the installation site to determine pipe location, they cut and thread pipes, bend them to required angles by hand or machines, and then join them by means of welded, brazed, caulked, soldered, or threaded joints. To test for leaks in the system, they fill the pipes with water or air. Plumbers use a variety of tools, including hand tools such as wrenches, reamers, drills, braces and bits, hammers, chisels, and saws; power machines that cut, bend, and thread pipes; gasoline torches; and welding, soldering, and brazing equipment.
Some plumbers and pipefitters work in specialized careers. For example, steamfitters install pipe systems that facilitate the movement of gases or liquids under high pressure), and sprinklerfitters install automatic fire sprinkler systems. Other specialists include diesel engine pipefitters, ship and boat building coppersmiths, industrial-gas fitters, gas-main fitters, prefab plumbers, and pipe cutters.
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