Traditionally water companies have installed all mains and connected up all service pipes. While developers can still choose to requisition mains and service connections from us, they can also now employ a Self-Lay Provider (SLP) to lay and connect mains and services. Upon completion of the work, we will then normally adopt the mains that have been installed by the SLP from the developer.

Benefits of Self-Lay


Developers can find self-lay beneficial because:


  • They may be able to employ a single contractor to install the water, gas and electricity infrastructure;
  • It may work out cheaper to Self-Lay than requisition, and
  • Self-Lay Providers (SLPs) may be able to offer more flexibility in relation to the timing of the required works.
Self-Lay or requisition?


If you are trying to decide whether to Self-Lay or requisition mains, please submit a preliminary mains enquiry and we will provide cost information on both options and let you know which aspects of the required work can be self-laid and which aspects cannot.

Find an accredited SLP

Lloyd’s Register keeps a list of Water Industry Registration Scheme accredited SLPs. There are over 200 accredited contractors nationwide.

For more information, please read the Design Construction Specification. You should also read our Self-Lay Policy and Developers’ Charter.

Self-Lay resources

Information for SLPs

Contact us about developments

All pre-development enquiries and mains applications from developers will be dealt with by our Developer Interface Team who will arrange for any required mains to be designed and priced, terms to be sent and the mains to be installed.

Sharon Ranahan – Developer Interface Manager

All enquiries from Self-Lay organisations and applications will be dealt with by our Development Services team who will produce or check the design of any required mains. They will send out agreements and deal with the payments for any non-contestable work. They will also deal with the asset value payments at the end of the job.

Tim St John – Head of Development Services

To discuss issues encountered onsite once mainlaying has begun, including changes to the design, you should speak to one of our Network Site Agent. You will be notified of the person responsible for your site before work commences. They will inspect the work as the installation progresses, go through your as-laid plans with you, arrange bacteriological testing and attend the pre-start meeting. Weekly whereabouts should be sent to our Network Site Agent.

Nick Parr – Development Services Operations Manager

You should contact our New Supplies team about service connection issues. They will inspect the supply pipes before connection, authorise the connection and deal with the invoices and payments connected with the services.

Lynn Hawkins – New Supplies Manager

Please address correspondence to the relevant department at:

Bristol Water
Bridgwater Road
BS13 7AT