Self lay
As a developer you may choose to lay water mains yourself under a self-lay agreement with us.
As a developer you have three choices on how the water mains and services are installed on your development site.
- You can ask Wessex Water to install the water mains & services
- You can use an accredited self-lay provider (SLP) to install the water mains & services
- New Appointments and Variations (NAVs) - details about NAVs and how to apply
If you are choosing to lay water mains yourself by using an accredited SLP. A list of WIRS accredited SLPs can be found on the Lloyds Register. You can also familiarise yourself with the process by reading through the Water Sector Guidance (WSG).
If you are using a WIRS Accredited Designer to produce a water design for approval, please complete a point of connection application. This will allow you to estimate costs, determine the scope of the self-lay works and produce a design using a WIRS accredited designer that Wessex Water will approve (subject to meeting our design and construction specifications requirements located below).
Wessex Water adoption requirements
Annual contestable summary
wessex-water-annual-contestability-summary.pdf - (127kb)Design construction specification
wsg-appendix-d-design-and-construction-specification.pdf - (1.35mb)Model water adoption agreement
wsg-appendix-f-model-water-adoption-agreement.docx - (171kb)Service connection call-off requirements
wessex-water-service-connection-call-off-requirements.pdf - (138kb)Application forms
Point of connection enquiry form
wwds-slms-point-of-connection-enquiry.pdf - (106kb)SLM2 - Notification of commencement of mainlaying form
wwds-slm2-notification-of-commencement-of-mainlaying.pdf - (48kb)SLM3 - Chlorination certificate
wwds-slm3-chlorination-certificate.pdf - (71kb)SLM4 - Notification of routine in-line mains connection
wwds-slm4-safe-control-of-routine-mains-connection-notification.pdf - (61kb)SLM5 - Request for Wessex Water to make mains connection
wwds-slm5-request-for-wessex-water-to-make-mains-connection.pdf - (44kb)SLM6 - Notification of completed or aborted works
wwds-slm6-notification-of-completed-or-aborted-work.pdf - (64kb)SLM7 - Wessex Water whereabouts
wwds-slm7-wessex-water-whereabouts.pdf - (39kb)SLM11 - Contestability application
wwds-slm11-contestability-application.pdf - (162kb)SLS1 - Service connection self-certification
wwds-sls1-service-connection-self-certification.pdf - (66kb)SLS2 - Notification of proposed service connection
wwds-sls2-notification-of-proposed-service-connection.pdf - (44kb)SLS3 - Meter details form
wwds-sls3-meter-details.pdf - (57kb)Guidance notes
Materials list
wwds-sl-materials-list.pdf - (130kb)Sluice valve chamber
sluice-valve-installations-chamber.pdf - (329kb)Washout chambers
fire-hydrant-washout-oxo-instalations.pdf - (510kb)Fire hydrant chambers
fire-hydrant-washout-oxo-instalations.pdf - (510kb)Network meter chambers
small-chamber-for-pressure-reducing-vavle-reflux-vavles-meters-215.pdf - (123kb)Stop valve and meter
stop-valve-meter-238.pdf - (82kb)