Sewers for Adoption contains guidance for the design and construction of sewers that will be adopted by Sewerage Undertakers.

In the area of water and sewerage companies wholly Sewers for Adoption was superseded by the Ofwat Adoption Code and specifically the Sewerage Sector Guidance from 1st April 2020. (see

Companies wholly or mainly in Wales

In the operating area of Dŵr Cymru Welsh Water. and Hafren Dyfrdwy Section 42 of the Flood and Water Management Act 2010 has been implemented. This requires any developer who wishes to make a connection to the public sewer system, that creates any sewers or lateral drains first to enter into a Section 104 agreement with the Water and Sewerage Company that will ensure the any sewers or lateral drains created by the connection will be adopted by the Sewerage Undertaker. 

Companies wholly or mainly in England

Defra has not currently announced when they propose to implement this legislation in the area of companies wholly or mainly in England.  Until this happens Section 104 agreements remain optional in the areas of the other Water and Sewerage Companies.

This website gives information of the standards and process for adoption in accordance with Section 104 of the Water Industry Act 1991.