From The Collaborative International Dictionary of English v.0.48 [gcide]:
2. Hence: Any worker who installs or repairs piping and related equipment for conveyance of water, gas, or drainage into or out of buildings, or within buildings to fixtures or equipment using water. The type of material used for the conduits varies with the application, and may be may be of lead, iron, copper, glass, palstic, or other material. [PJC]
From WordNet (r) 3.0 (2006) [wn]:
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