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Sewer Adoptions

If you would like to put forward newly constructed or existing sewers and associated assets for adoption, the Adoptions Team will be happy to guide you through the process. We will ensure that the assets proposed are designed and constructed to meet the required standards to allow them to be adopted into Yorkshire Water as public assets. We will take ownership of the network and assets from the developer who constructed and installed it.

Yorkshire Water is the Statutory Sewerage Undertaker for the Yorkshire Region. However, if you wish you can approach a New Appointment and Variation (NAV) to adopt your sewer network. For further details, please refer to the Ofwat website.

Codes for Adoption

In October 2019, OFWAT approved the Sewerage Sector Guidance documentation that the sector has prepared to meet the requirements of OFWAT’s Code for Adoption Agreements. The documentation can be found here  https://www.water.org.uk/sewerage-sector-guidance-approved-documents/

The new guidance has now come into effect from 01 April 2020. This guidance introduces a new, mandatory approach to sewer adoption. In summary, new procedures, a new system of redress and a new model sewer adoption agreement have been prepared. The biggest change is the inclusion of guidance as to which SUDS are capable of adoption as sewers.

Please click here to read the agreed principles to deal with the transition of sites between the previous Sewers for Adoption regime and the new Sewerage Sector Guidance.

Adoption of New Sewers (S104)

You can apply online using our online application portal, or you can download and submit your application form.

Fill in your form online Download our form

The adoption of sewers and sewerage assets is contained within S104 of the Water Industry Act 1991. This covers the adoption of private sewers to be constructed at a future date subject to an Agreement with the Sewerage Undertaker. Once adopted, they become public sewers and will be operated and maintained by Yorkshire Water.

Sewerage assets offered for adoption, should be designed and constructed in accordance with the Design and Construction Guidance, Local Practices and Technical Standards contained within the Code for Adoption (2020).

The Sewerage Sector Guidance procedure for the adoption of new sewers and sewerage assets is outlined below, along with the relevant forms for completion:

  • Stage 1a - Pre Planning Enquiry (you can apply online or download our form) 

  • Stage 1b - Pre Design Discussion – to request a pre design discussion with us, please download, complete and return this request form to us along with the supporting information. This is highly recommended prior to submission of an application, to ensure our requirements are clear and any issues with a site can be addressed at an early stage

  • Stage 2 - Design of New Sewerage System – to submit an application, you can either download a form or make an application online - Fill the form in online or download the form

  • Stage 3 - Adoption Agreement – on your instruction we will prepare the Model Sewer Adoption Agreement for your site. Please download, complete and return this request form to us along with the supporting information.  However, if you wish to prepare the Model Sewer Adoption Agreement yourself and return it to us for signing, please download a copy here.

  • Stage 4 - Construct Gravity Sewerage System – on receipt of Conditional and / or Technical Acceptance for your site, you may now request a Pre Start Inspection Meeting by downloading, completing and returning this request form to us along with the supporting information

  • Stage 5 - Maintenance Period – if you would like to request a Pre Maintenance Inspection of your site, please download, complete and return this request form to us along with the supporting information

  • Stage 6 - Final Inspection and Vesting – if you would like to request a Final Inspection of your site, please download, complete and return this request form to us along with the supporting information

  • Stage 7 - Variation of New Sewerage System – if you would like to request a variation to the Technically Accepted drawings contained within the signed S104 Agreement for your site, please download, complete and return this request form along with the supporting information

Please do not start any construction works on site until you have received Conditional and / or Technical Acceptance of your design proposals from us. If you do, the works are undertaken entirely at your own risk and cost. You cannot have an inspection from us until Conditional and / or Technical Acceptance has been issued for the site.

Our Developers Guide to the Adoption and Vesting of New Sewers (S104) provides all of the information that you need when offering new sewers and sewerage assets for adoption and an overview of the vesting process and requirements once your development site has reached 51% occupancy.

Further Developer Guides you may find useful are below:

Retrospective Sewer Adoption (S102)

Section 102 of the Water Industry Act 1991 covers the adoption of existing private sewers and sewerage assets. Only the legal owners of a private sewer (including pumping stations and other ancillaries) can put them forward for adoption and therefore the applicant must be able to prove ownership. The sewers and sewerage assets put forward must conform to our adoption requirements. Once adopted, they become public sewers and will be operated and maintained by Yorkshire Water.

Our Developers Guide to Retrospective Sewer Adoption (S102) provides all of the information that you need when offering existing private sewers and sewerage assets for adoption.

You can apply online using our online application portal, or you can download and submit your application form.

Fill in your form online Download our form

Adoption of Pump Stations

The Adoptions team will technically assess all submissions received for the adoption of a pumping station against the Design and Construction Guidance, Local Practices and Technical Standards contained within the Code for Adoption.

The team work closely alongside Yorkshire Water’s Engineering Reliability colleagues and developers are encouraged to engage in early discussions with us prior to the formal submission of a S104 or S102 application so they are clear on our requirements and any issues with a site can be openly discussed. The adoption of a pumping station is typically included with the same S104 Legal Agreement as the gravity sewers on the development.

Pump Station Drawings

Pump Station Local Practice