Water main requisitions and self-lay


If you're building multiple properties on a site that will have a new road, then you'll probably need a new water main.

Water main requisitions

Water main requisitions are generally used when a developer is building two or more properties. If you’re looking for a water connection to a single property, visit our new water connections page instead.

Find out more here

Most new development sites which have a new road need a new water main, which we'll then connect to our existing network. The new main will serve the site and each property will then be connected to the new main via their own individual service pipe.

There are two ways you can get a new water main:

  • Self lay – This is where the new water main would be laid (and sometimes designed) by an accredited self-lay contractor instead of Welsh Water.
  • Requisitioning – This is where we’d design and lay the new water main ourselves.

Self-lay

You can choose to have your new water main laid (and sometimes designed) by an accredited self-lay contractor instead of us. Once your self-lay contractor has laid the pipes, we’ll check that they meet our terms and will adopt them into our network.

If you choose a self-lay contractor:

  • before any work starts, you’ll need to enter into a legal agreement with us, the landowner and the self-lay provider (SLP)
  • the SLP will also need to be Water Industry Registration Scheme (WIRS) accredited. More information on WIRS can be found here. Occasionally, we may accept companies that are not fully accredited, but we reserve the right to assess an SLP’s competency if it isn’t WIRS accredited
  • you need to keep us updated on the progress of the work

To avoid any delays, once your self-lay scheme has moved into construction, please keep us up to date with your programme. The below forms need to be submitted at various stages of construction to self.lay@dwrcymru.com.

Self-lay forms

SLN1Commencement of mainlaying 190719

Download
85kB, DOCX

SLN2Annex1Sampling Request 190719

Download
94.9kB, DOCX

SLN2Provision of supply for pressure and bacteriological testing 190719

Download
107.3kB, DOCX

SLN3Request for a permanent supply of water 190719

Download
69.6kB, DOCX

SLN4aRequest for DCWW to operate a valve for B2B connection 190719

Download
84.7kB, DOCX

SLN4bNotification of proposed routine contestable mains connection 190719

Download
68.1kB, DOCX

SLN5aNotification of completed routine mains connection 190719

Download
72.8kB, DOCX

SLN5bNotification of aborted routine mains connection 190719

Download
72.2kB, DOCX

SLN6Notification of commencement of water service connection 190719

Download
66kB, DOCX

SLN7Notification of completed water service connection 190719

Download
56.2kB, DOCX

SLN8Request to meter installation on water selflay scheme 190719

Download
63kB, DOCX

Vesting Certificate 190719

Download
43.8kB, DOCX

More information can be found by reading:

If you think self-lay is the best option for you, then here’s how you apply.

If you would like us to do your design for you, then head straight to our self-lay application form. If you are doing your own design, then you’ll need to submit our point of connection form before the self-lay application.

How much will it cost?

There are a few charges related to this service:

An initial application fee

This is an upfront non-refundable fee of £2,000+VAT, to be paid on application, using a valid credit or debit card. Once the works have been completed, we’ll then deduct the application fee from your pre-development payment, so you’ll just have to pay the difference.

For self-lay work, we will pay you for doing the work to reflect the future income we are going to receive from the scheme. We do this via a system of two payments:

Pre-development payment

This a payment you will make to us before starting the work.

It’s either the cost of delivering the non-contestable works or the estimated commuted sum for delivering the scheme, whichever is least.

It’s a variable charge, dependent on the specifics of each scheme.

In most circumstances, this is refunded on completion of the scheme by an accredited self-lay provider (SLP).

Asset payment

This is a payment we make to you or the SLP, which reflects the cost we’d have to pay our contractor for doing the work (the contestable works), minus the commuted sum. The commuted sum is the difference between the scheme’s projected income versus the costs of delivering that scheme.

It is paid to you after we’ve adopted the water main and have undertaken a final account to calculate the final asset payment. We also make interim asset payments where the scheme is vested in multiple phases.

For example, if the scheme would normally cost Welsh Water £10,000 to do the work ourselves or via our contractor, and guarantees us a future revenue of £9,000, then the asset payment would be worked out by £10,000 minus the £1,000 difference, meaning the final asset payment would be £9,000+VAT.

As a not for profit company, our charges are based on the cost of delivering the service only.

For information on our charges, visit our schedule of charges here.

 

Where can I find more information?

  • Water UK has a helpful code of practice which you can download here.
  • Lloyds Register has a useful search tool for Water Industry Registration Scheme (WIRS) accredited self-lay contractors.

Don’t forget

  • Even if you apply to self-lay your water mains, you will still need to apply for new water connections to each property.

Requisitioning

Requisitioning involves Welsh Water designing and laying the water main.

Our specialist engineers will be able to take you through the whole process, from designing the new water main through to construction.

If you aren’t sure how to fill out the form or have any questions, take a read of our guidance notes.

How much will it cost?

There are two charges related to this service:

An initial application fee
This is an upfront non-refundable fee of £2,000+VAT, to be paid on application, using a valid credit or debit card. Once we’ve completed the works, we’ll then deduct the application fee from your commuted sum, so you’ll just have to pay the difference. If you choose to pay by relevant deficit, the fee will be refunded in full.

A commuted sum OR relevant deficit
Where a requisition scheme is delivered by Welsh Water, the future income from the development is offset against the cost of Welsh Water delivering the scheme.

There are two payment options for this. It can be done through a commuted sum - where the future Welsh Water revenue generated by the scheme is estimated and the developer pays any shortfall on a lump sum, or the relevant deficit - where the developer undertakes to pay the actual difference on an annual basis, which is backed up by the provision of a bond.

For example, if the scheme costs Welsh Water £10,000 to carry out, but guarantees Welsh Water a future revenue of £8,000, then the developer will have to pay the £2,000 difference.  VAT is only applicable where the properties are not exempt from VAT.

Both are variable based on the unique needs of each development. 

As a not for profit company, our charges are based on the cost of delivering the service only.

For information on our charges, visit our schedule of charges here.

Don’t forget

  • Even if you are requisitioning new water mains from us, you will still need to apply for new water connections to each property.