Last edited 10 Nov 2019



Sewerage (the sewer system), is the underground networks of pipes that carries sewage (waste water and excrement), waste water and surface water run-off, from buildings to treatment facilities or disposal points.

Types of sewer include:

There are a number of ways of moving the contents of sewers:

In September 2010, the government announced that most private sewers that connected to the public sewer network would be transferred to the ownership of the regulated sewerage companies in England and Wales. Private sewers that were connected to the public sewer network before 1 July 2011 were transferred on 1 October 2011.

NB A drain is a pipe that serves only one building, conveying water and waste water to a sewer. A lateral drain is a section of drain positioned outside the boundary of a building, connecting with the drains from other buildings to become a sewer.

[edit] Related articles on Designing Buildings Wiki