The not-for-profit company is looking for partners to deliver a significant programme of new customer meter installations, fix network leaks and repair and maintain its water network to deliver improvements to asset health.

The contract will run for a period of up to 8 years, for AMP8 (2025-2030) and early AMP 9.

The works and services will be delivered through two distinct arrangements.

One will be focused on metering, customer appointment programmes, and water network maintenance. This is worth an estimated total maximum value of £400m.

The other will be focussed on mains rehabilitation and pipelines, across a range of low, medium and high complexity projects dealing with pressurised pipes, with an estimated total maximum value of £352m.

Ian Christie, managing director Water Service, Capital Delivery and Asset Planning Dwr Cymru Welsh Water, said: “This contract is a crucial part of our drive to ensure the continuous improvement of our service to our customers across Wales and Herefordshire.

“We have challenging targets for leakage, interruptions to supply and acceptability of water to our customers and we will only succeed with these targets if we work closely together with our partners in the sector to deliver asset improvement works.

“The scope and value of this work shows Welsh Water’s ambition and drive to deliver the best possible quality of service and value to our customers.”

For more details email Welsh Water.

Welsh Water is also planning to invite tenders in October for firms to deliver waste water improvements.

The AMP8 Wastewater Networks framework will come into force from November 2025 and run forup to 8 years.

It will be split into four regional lots:

Lot 1 North Wales Wastewater Network Repair & Maintenance & Network Operating Services
Lot 2 – Hereford, Powys & Gwent Wastewater Network Operating Services
Lot 3 – Southwest, Swansea, Valleys & Cardiff Wastewater Network Operating Services
Lot 4 – South Wales, Hereford & Powys – Repair and Maintenance