DJM Services Pembs Ltd is now a Self-Lay organisation accredited by the Water Industry Registration Scheme (WIRS), operated by Lloyds Register on behalf of water utility companies. The scheme accredits DJM Services to install new water networks and service connections to a standard suitable for adoption by the host water utility company. We also have the WIAPS qualification which means we can carry out trench inspections, in line with Water Regulations 

DJM worked on the DCWW repair and Maintain contract for 10 years, this gives us a wealth of knowledge to help provide our customers with a wide range of  water services.

Our staff have Profusion & Butt fusion qualification, EUSR water hygiene and SHEA water accreditation.

We can:-

  • Lay mains & services in Private land
  • Profusion / Butt fusion Welding
  • Agricultural water supplies
  • Water pipe repairs
  • Lay only



Many Developers are not aware they can now choose who they appoint to install the water infrastructure on their developments, it doesn’t have to be the water company. Developers also have the option to appoint a self-lay organisation to carry out the work this is known as ‘Self-lay’.

The developer will have to enter into an agreement between themselves, the water company, and the self-lay organisation (“SLO”), the SLO can then install the new network in accordance with the terms of the agreement the water company will then to take over responsibility for the new network and adopt it.

Once the agreement is in place, the appointed SLO is then free to carry out the site mains construction, all service pipe connections, all necessary testing and commissioning, and hand the completed network over to the host water company for adoption an asset payment

After the water company has adopted the new network they become the owners and are thereafter responsible for its maintenance in the traditional way.

Why use Self-Lay?

  • Save money
  • Mains and services can be scheduled in to fit in with the Developers program.



The Water Industry Approved Plumbers’ Scheme (WIAPS) is run by the Water Regulations Advisory Scheme (WRAS) on behalf of a number of water companies.

We also have the WIAPS qualification which means we can carry out trench inspections, in line with Water Regulations.

So Developers don’t need to wait for Water Company to come on site to sign off trenches.

Where do the regulations apply?

The Regulations are typically in effect between the boundary of a property and the point of discharge as illustrated below