Plumbing  refers to the system of pipes, fixtures, and other apparatus in a structure  that supplies water and removes liquid and waterborne wastes. The foremost role  of an integrated plumbing system is to safely deliver and remove water; therefore,  fixtures and fittings must conform to strict codes, regulations, and trade  standards. Manufacturers of fixtures are also concerned with producing styles  that appeal to consumers by reflecting current trends in home decoration. 
                                 
Most plumbing fixtures and fittings are built for residential use. Primary  residential applications include kitchens, bathrooms, utility rooms and  gardens. Fixtures also complement various commercial, industrial, and  institutional plumbing systems. Most fixtures and fittings may be divided into  one of four groups: traps, tubes, and drains; pipe fittings; faucets and  toilets; and shower fixtures. Manufacturing metals used by the industry include  copper, brass, bronze, and iron. Tubes are used to connect traps, garbage  disposals, dishwasher drains, and other drains and devices. They come in a  variety of shapes and materials to suit all applications and configurations.  | 
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