7011pipes (conduits)TTptVocabulário Colaborativo em Artes e Arquitetura active approved pipes (conduits)Tubular conduits, generally leakproof, for the transport
of liquids or gases. For assemblies of pipes, tubes, and
fittings in plumbing systems, use "piping (plumbing system
components)."

Source: AAT

http://vocab.getty.edu/page/aat/300014662

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