Would one say:

The sewer pipelines are old and need to be replaced. or ...

The sewerage pipelines are old need o be replaced


The sewer infrastructure ...

The sewerage infrastructure

any help?


A sewer is

An artificial, usually underground conduit for carrying off sewage or rainwater.

so a sewer pipeline is a slightly redundant term, only necessary to distinguish a sewer pipeline from some other kind of sewer.

Sewerage is

  1. A system of sewers.
  2. Removal of waste materials by means of a sewer system.
  3. Sewage.

so unless you have the third meaning fixed in other parts of your conversation it again seems unnecessary.

You could call it a sewage pipe

Liquid and solid waste carried off in sewers or drains.

in the same way as you might have a water pipe or a gas pipe. Infrastructure is mush word that serves no purpose here. I myself would just go with sewer:-

The sewers are old and need replacing.


A sewer is an underground channel for taking away waste water. So a sewer pipeline is an underground pipeline that serves as a sewer (or perhaps a pipe that connects directly to the sewer).

Sewerage is the whole drainage system that uses sewers. So you never need to use the word infrastructure; you can just say sewerage. A sewerage pipeline can be any part of the sewerage system, so it is more general than sewer pipeline.

  • Could you substantiate this with a reference? I could not find anything using the "usual suspects". – NamSandStorm Nov 19 '13 at 6:36
  • No, I can't, other than the dictionary definitions of sewer and sewerage. But my answer is entirely consistent with the normal patterns of English usage. – Pitarou Nov 19 '13 at 6:50
  • 1
    From what I've seen in leaflets trying to get us to take out additional insurance, a 'drain' connects from our house to a 'main drain', and this in turn connects to the local 'sewer'. How standard this terminology is, I don't know. – Edwin Ashworth Nov 19 '13 at 8:16

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