Skip to contentBack to top of pageThames Water logoThames Water logo
Skip to contentBack to top of page
Thames Water logoThames Water logo
Home
Developer services
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 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
  11. DS-DRG-WN-0301 - Install two temporary fittings option A (long sider)
    pdf | 308.8 KB
  12. DS-DRG-WN-0302 - Install one temporary fitting option B (short sider)
    pdf | 306.8 KB
  13. DS-DRG-WN-0303 - OXO installation and retained washout
    pdf | 306.7 KB
  14. DS-DRG-WN-0304 - OXO Installation and temporary washout
    pdf | 309 KB
  15. DS-DRG-WN-0305 - Double spade valve installation point
    pdf | 300.1 KB
  16. DS-DRG-WN-0306 - Double spade valve installation
    pdf | 302.9 KB
  17. DS-DRG-WN-0307 - Extending in-line and retain fire hydrant or washout
    pdf | 309.8 KB
  18. DS-DRG-WN-0312 - Self-lay installation
    pdf | 303.4 KB
  19. DS-DRG-WN-0313 - Bridge crossing
    pdf | 303.6 KB
  20. DS-DRG-WN-0314 - Terminating a phased main
    pdf | 306.4 KB
  21. DS-DRG-WN-0318 - Self-lay spur connection option A
    pdf | 309 KB
  22. DS-DRG-WN-0319 - Self-lay spur connection option B
    pdf | 307.5 KB
  23. DS-DRG-WN-0320 - Self-lay double spade valve installation dry main inline
    pdf | 300.8 KB
  24. DS-DRG-WN-0321 - Self-lay double spade valve option A (long sider)
    pdf | 301.5 KB
  25. DS-DRG-WN-0322 - Self-lay double spade valve installation option B (short sider)
    pdf | 300.8 KB
  26. DS-DRG-WN-0323 - Install new main temporary fittings
    pdf | 298.8 KB
  27. DS-DRG-WN-0401 - Services combined connection non-domestic
    pdf | 296.5 KB
  28. DS-DRG-WN-0402 - Services domestic connection flats
    pdf | 298.5 KB
  29. DS-DRG-WN-0403 - Services combined connection flats
    pdf | 301 KB
  30. DS-DRG-WN-0404 - Services dedicated domestic connection
    pdf | 298.5 KB