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Sewer Adoptions

If you would like to put forward newly constructed or existing sewers and pumping stations for adoption, the Sewerage Technical will 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.

We are happy to meet with you at the outset of the process, prior to submission of a complete application, to ensure our requirements are clear and any issues with a site can be discussed at an early stage.

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.

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Adoption of New Sewers (S104)

The adoption of sewers, including pumping stations and other ancillaries 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 Sewers for Adoption (6th Edition) or Sewers for Adoption (7th Edition) and in line with Yorkshire Water’s Engineering Specification.

Before You Apply

Before submitting your application, there are some key things you need to know.

  • Do you have planning permission?

Before applying, you need to have had your planning permission approved for your new development site. We need to see a copy of the approved planning permission at the application stage.

If planning permission has not yet been approved or you’re not ready to make an application for adoption, but you need to know if our network can accommodate your proposed development you have the option to make a Pre-Planning Sewerage Enquiry

  • Do you have approval to connect to the public sewer?

Please ensure you have identified where the nearest existing public sewer is to your development site which you propose to connect to. You are then required to make an application to connect to the public sewer through the Sewer Connection application process

  • Do you have a drainage design?

The sewers you are proposing for adoption must have been designed wholly in accordance with Sewers for Adoption (6th Edition) or Sewers for Adoption (7th Edition). The submission cannot combine parts from both Editions.

We require the detailed design and layout drawings to cover all aspects of the proposed sewers to enable us to undertake an initial assessment. If you have any queries relating to your proposed drainage design, then we actively encourage you to engage with us at the earliest opportunity prior to submission. We are happy for you to come in and discuss your drainage design proposals.

What happens next?

Once you have submitted your completed application form and proposed drawings, we will technically assess your submission and provide an initial response detailing whether the proposals are acceptable or not.

  • if the application does not meet the criteria, we will tell you the reasons for this and what you need to do to rectify the proposals
  • when we are happy with the changes requested, we will issue Technical Approval and invoice you for fees incurred. These are detailed in our Sewerage Technical Fees document for 2018-2019 (provide link to fees document – PDF ).
  • Please do not start on site until you have received Technical Approval of your proposals from us. If you do, the works are undertaken entirely at your own risk
  • if you would like to start on site, then you can pay a non-refundable fee for an early start inspection whilst your application is being assessed
  • once we are in receipt of all the necessary information, we will then start to prepare the legal Agreement which is a nationwide standard Agreement as set out in Sewers for Adoption 6th Edition
  • during construction, our inspectors will attend site to monitor work being undertaken
  • when the sewer network and any pump stations on the site are fully constructed, it is your responsibility to provide us with ‘as built’ drawings for the development site. A copy of all the drawings included within the signed S104 Agreement must be provided in ‘as built’ format
  • when there is 51% occupancy on the site, you can request a pre-maintenance inspection by contacting the Developer Services Customer Centre
  • if the sewers and pump station are found to be satisfactory, then the maintenance period (of typically 12 months) can commence
  • just before the end of the maintenance period, it is your responsibility to contact us to arrange a Final Inspection of the site. Once any outstanding remedial works are completed, we will arrange to formally adopt the sewers and pump station
  • once adopted, the sewers and pump stations become public assets and Yorkshire Water are then responsible for the operation, maintenance and repair of them going forward

The document below details the annual fees for our Sewerage Technical applications and services provided by Developer Services.

Retrospective Sewer Adoption (S102)

Legislation covering the adoption of sewers, which includes pumping stations and other ancillaries, is contained within the Water Industry Act 1991. Section 102 of the Act covers the adoption of existing private sewers. Once adopted, they become public sewers and will be operated and maintained by Yorkshire Water.

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, pump station and other ancillaries put forward must conform to our adoption criteria (Sewers for Adoption 6th or 7th Edition) and Yorkshire Water’s Engineering Specification.

What happens next?

Once you have submitted your completed application form, camera survey and drawings, we will technically assess your submission and provide an initial response detailing whether we will consider your proposal for adoption.

  • if the application does not meet the criteria, we will tell you the reasons for this and what you need to do to rectify the proposals. You must be able to provide evidence as to who is the legal owner(s) of the sewers before the adoption can be progressed.
  • once we have reviewed the drawings and camera survey, we will visit the site to undertake an inspection of the sewers / manholes / pumping station in accordance with Sewers for Adoption (6th or 7th Edition).
  • following this visit, we will provide you with a report detailing any remedial works that must be carried out before the adoption process can begin. These remedial works must be completed at your expense
  • once the remedial works have been carried out to bring the sewers up to adoptable standard, Yorkshire Water will then serve two months’ notice on all owners of the sewer(s)
  • if after this two month period, if no objections have been received, and providing that all easements, land transfers and other legal Agreements have been concluded, the owners will be issued with a vesting declaration stating that the sewers have been adopted as public
  • Yorkshire Water will then be responsible for the operation, maintenance and repair of the assets going forward

If objections are received within the two month period, these will need to be resolved by yourselves prior to adoption.

Adoption of Pump Stations

The Sewerage Technical team will technically assess all submissions received for the adoption of a pumping station against Sewers for Adoption (7th Edition), Yorkshire Water’s Engineering Specification and the Developer Services Design Specification for the Adoption of Small Submersible Foul and Surface Water Pumping Stations.

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.

Vesting of Sewers and Associated Assets

As a developer you have already signed up to constructing the drainage system on a development site, in accordance with the Technically Approved drawings and specific site details. The engineering layout plans will also be included within the signed S104 Agreement. By doing so, you have also committed to ensuring that you have sought and agreed all consents and legal requirements for the development site.

What happens next?

As part of the formal adoption process, Yorkshire Water need to ensure that you have provided us with the relevant information we require to progress the adoption of a drainage system on a development site and that you have requested Yorkshire Water to inspect the drainage system during the construction period, allowing us to formally take ownership of the agreed system and assets.

Provisional Certificate

For a Provisional Certificate to be issued we require the following information to be submitted for review:

  • Formal Agreement
  • Record of Inspections by Yorkshire Water
  • No outstanding remedial works
  • As Built drawings (that reflect all of those included within the S104 Agreement)
  • Assets to be Operated and Maintained
  • Land Transfers / Rights of Access Details
  • Surface Water Discharge Conditions
  • Health and Safety File

Once this information has been reviewed, and found to be satisfactory, and following the completion of a pre-maintenance inspection, we will issue a Provisional Certificate confirming that the site has been placed on maintenance.

Final Certificate

The final inspection of a site is typically the last inspection required to ensure that the system is operating how it was designed to and that there are no further remedial works required before Yorkshire Water formally take ownership.

During this inspection, we will re-inspect the whole system that is shown within the green boundary and shown coloured on the Engineering Layout Drawing within the S104 Agreement.

This inspection will typically take place 12 months after the site has been put on maintenance and can be requested to be arranged two months prior to the end of the maintenance period.

Vesting Declaration

Following a successful handover meeting (for sites with pumping stations, detention basins, sewerage treatment works and screens only), a vesting declaration will be issued which confirms in writing that we have now taken ownership of the system(s).

All legal matters must have been finalised prior to the issue of the Vesting Declaration.

Any agreed Commuted Lump Sums will also have to have been deposited with Yorkshire Water prior to the issue of the Vesting Declaration.

Once the formal documentation has been issued, we will pass the details of the site onto our Asset Integration colleagues to ensure the Statutory Sewer Records are updated.