plumbing


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plumbing,

piping systems inside buildings for water supply and sewage. The Romans had a highly developed plumbing system; water was brought to Rome by aqueducts and distributed to homes in lead pipes—hence the name plumbing from the Latin word plumbum for lead. During the Middle Ages, however, plumbing became almost nonexistent. In fact, London's first water system after the Middle Ages (c.1515) consisted partly of the rehabilitated Roman system; the rest was patterned after it. Modern plumbing began in the early 1800s, when steam engines became capable of supplying water under pressure and cheap cast iron pipes could be supplied to carry it. The common materials used today in water supply pipes are steel, copper, brass, plastic, and lead. Plumbing for sewage is made of cast iron, steel, copper, and plastic. Water pressure is usually insufficient to supply the needs of tall apartment and office buildings; in such cases storage tanks are installed on the roof, into which a pump lifts water. The water then flows through the piping system of the building by gravity. Smaller buildings may have a pneumatic tank for the same purpose. The tank is partly filled with air, which is compressed when water is pumped in so that it will force water through the pipes. Sewage and drain systems typically have a trap, often a loop-shaped section of pipe, to seal off vapors in the pipes from the rest of the building. Vent pipes lead these vapors to the outside of the building; they also eliminate any suction in the piping and thus prevent the siphoning of water from traps when a nearby fixture discharges. In the 1970s and 80s flexible polybutylene plumbing was widely installed in standard and mobile homes. When unprecedented numbers of these plastic pipes began leaking because of exposure to chlorine and other chemicals in tap water, homeowners brought class-action lawsuits against the manufacturers, which were settled in 1995 for hundreds of millions of dollars.

What does it mean when you dream about plumbing?

A conduit of water or of waste, plumbing symbolizes the flow of emotions. If the plumbing is stopped up, the dreamer may need emotional “release.”

plumbing

[′pləm·iŋ]
(civil engineering)
The system of pipes and fixtures concerned with the introduction, distribution, and disposal of water in a building.
(electromagnetism)
Slang term for the pipelike waveguide circuit elements used in microwave radio and radar equipment.

plumbing

2. The work or business of installing in buildings the pipes, fixtures, and other apparatus for bringing in the water supply and removing liquid and waterborne wastes.

plumbing

Hose tubing and lines for connecting liquid systems [LOX (liquid oxygen), hydraulic, lubrication, fuel] and pneumatic systems of the aircraft.

plumbing

(Unix) Term used for shell code, so called because of the prevalence of "pipelines" that feed the output of one program to the input of another. Under Unix, user utilities can often be implemented or at least prototyped by a suitable collection of pipelines and temporary file grinding encapsulated in a shell script. This is much less effort than writing C every time, and the capability is considered one of Unix's major winning features. A few other operating systems such as IBM's VM/CMS support similar facilities.

The tee utility is specifically designed for plumbing.
References in periodicals archive ?
Rob Norton, master plumber and owner of Affordable Plumbing Heating and Air Conditioning, expresses excitement for his company's new residential plumbing division.
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Paul already has his own business, 14U Electrical and Plumbing Services, in partnership with his brother and sister-in-law, but decided to go back to college in order to gain Corgi approval to work with gas.
Plumbing fixture shipments are expected to approach $4.5 billion in 2004 on annual increases of 3.5 percent.
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