Companies wholly or mainly in Wales
In the area covered by Dŵr Cymru Welsh Water and Hafren Dyfrdwy, where Section 42 has been implemented, the Welsh Minsters have published standards for gravity foul sewers. These are available on the Welsh Government Website . Industry recommendations to support the Ministers Standards for gravity foul sewers, and guidance on surface water sewers and pumping stations is contained in Sewers for Adoption 7th Edition. There are some company variations for pumping stations which will be added to this site when they are available.
Companies wholly or mainly in England
In the areas covered by other Water and Sewerage Companies, where Section 42 of the Flood and Water Management Act has not been implemented, the developers can chose to design to Sewers for Adoption 6th edition or Sewers for Adoption 7th Edition.
A simplified edition for Sewers for Adoption, suitable for very small developments is will be available in the New Year.