sewer main

Noun
  1. A main in a sewage system (synset 104186332)
    is a type of: main - a principal pipe in a system that distributes water or gas or electricity or that collects sewage
    is a part of: sewage system, sewage works, sewer system - facility consisting of a system of sewers for carrying off liquid and solid sewage
    same as: sewer line

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