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We operate the Water Industry Registration Scheme (WIRS) on behalf of water utility companies and the WIRSAE accreditation on behalf of Market Operator Services Ltd (MOSL) and water wholesalers.

A WIRS accredited self-lay organisation may perform works on the connection of water mains and supplies to a property, dependent on the status and scope of accreditation.

A WIRSAE Provider contracted by retailers to carry out accredited work (as defined in the Wholesale Retail Code and detailed in the generic code of practice supplemented by adopting utilities addendums) can be accredited under this scheme. Those Adopting Utilities within England that recognise this scheme will allow WIRSAE Providers that hold the appropriate scopes of accreditation to tender for, and if successful undertake temporary / permanent disconnections and meter installation / replacement works.

Find a WIRS accredited self-lay organisation or WIRSAE providerMcGregor McMahon

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Approval Key

full approval

Scopes highlighted in green are fully accredited.

partial approval

Scopes and Services highlighted in blue are for partial approval meaning the company has the required systems and procedures to do the work but has yet to demonstrate these or is currently unavailable to offer work for surveillance.

approval due to expire

Scopes highlighted in yellow are fully accredited but are due to expire in less than one month.

gap analysis

Scopes highlighted in aqua are for GAP Analysis, meaning the company has the required systems and procedures to do the work but has yet to demonstrate these or is currently unavailable to offer work for surveillance.

approval expired

Scopes highlighted in fuchsia have now expired or have been suspended.

bim ready

BIM Providers who can demonstrate that they have met the requirements of the BIM Guidance document and the referenced standards but do not currently have BIM projects against which they can demonstrate the implementation of those standards

    WIRS Scopes

    Design

    CMS Construction of Mains and Services - All works
    Covers off-site work and on-site work with pipe diameters over 355mm diameter

    CMS Construction of Mains and Services - Site works only
    Covers work on development sites with mains up to 355mm diameter

    CMS Construction of Services on Development Sites
    This scope covers service laying on connections not exceeding 63mm diameter (OD) including services to new on-site mains laid by others.

    PM
    Procedures in place to manage the work and use companies holding construction accreditation.