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Change proposal 019 – sewerage sector documents – design and construction guidance – final decision

Document Cited in Related
Date24 February 2025
Centre City Tower, 7 Hill Street, Birmingham B5 4UA
Westferry House, 11 Westferry Circus, Canary Wharf, London, E14 4HD
www.ofwat.gov.uk
Code for Adoption Agreements
1
Sewerage sector documents: Change proposal (Ref 019)
Modification proposal Sewerage Sector Guidance Appendix C – Design and
Construction Guidance: Addition of the material High Density
Polyethylene for raising sections to DCG v2.1 E6.7
Independent Water Adoption
Panel Recommendation
The Panel recommended rejecting the proposed change
Decision Ofwat has rejected the proposed change
Publication date 24 February 2025
Implementation date N/A
Background
Torrent Water Management Limited (Torrent) submitted this change proposal to the
Independent Sewerage Adoption Panel (the Panel) on 8 July 2024, with the Panel publishing
the proposal on its website on the same day. The function of the Panel is to consider change
proposals to the sewerage sector guidance and model sewerage adoption agreement (the
Sewerage Sector Documents) which apply to companies operating wholly or mainly in
England. These documents were developed by companies as required by the Code for
Adoption Agreements (the Code) and came into effect in April 2020. A change proposal is
defined in the Code as a proposed change to the sector guidance or the model adoption
agreements.
The change proposed by Torrent concerns the Design and Construction Guidance (DCG)
which is Appendix C of the Sewerage Sector Documents. Specifically, Torrent is seeking
changes to subsection E6.7 of the DCG which is about setting manhole covers and frames.
Torrent would like to include High Density Polyethylene (HDPE) as a material for precast units
or cover frame seating rings.

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