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Self-laying new mains and services

Self-laying new mains and services

Pre-planning enquiries

We can provide guidance on the layout or design of your project. This service is for 10 or more properties only.

View pre-planning process

About self-laying mains

You can choose to use a self-lay provider rather than Thames Water to lay mains and service connections

View self-lay overview

Self-lay application process

It's easy to apply online once you've got all your supporting documents ready. Before you start, find out everything you need to know.

How to apply for self-lay

Design and construction specifications

  1. Design and construction guide 2024-25
    pdf | 754.9 KB

Thames Water SLP policies

  1. Annual contestability summary
    pdf | 248.6 KB
  2. Minimum information requirements
    pdf | 186.6 KB
  3. Redress policy
    pdf | 215 KB

Forms

  1. Point of connection and capacity check application form
    pdf | 866.2 KB

Additional technical documents

  1. DS-DRG-WN-02250 - Extension spindle details
    pdf | 301 KB
  2. DS-DRG-WN-02251 - Covers 1 - 150 x 150 and 225 x 225
    pdf | 459.3 KB
  3. DS-DRG-WN-02252 - Covers 2 - 380 x 230 x 125
    pdf | 393.8 KB
  4. DS-DRG-WN-2253 - Covers 3 - 600 x 600 and 675 x 675
    pdf | 417.7 KB
  5. DS-DRG-WN-02254 - Covers 4 - 600 x 450
    pdf | 412.3 KB
  6. DS-DRG-WN-02255 - Covers 5 - 900 x 600
    pdf | 416.8 KB
  7. DS-DRG-WN-02270-01 - Standard tee connection setups valves
    pdf | 333.3 KB
  8. DS-DRG-WN-02270-02 - Standard washout and fire hydrant set up
    pdf | 337.8 KB
  9. DS-DRG-WN-02275 - Large communication pipe
    pdf | 342.7 KB
  10. DS-DRG-WN-0300 - Standard fitting legend
    pdf | 239.2 KB