Contractors are sought for up to £330M of pressurised pipeline work in Wales.
Dwr Cymru Welsh Water advertised the framework in the Official Journal of the EU.
Selected contractors will carry out works including laying new water mains, sewers and rising mains; and repairing existing infrastructure.
Between three and 27 firms will be selected for the framework, which will last for an initial four years with up to three annual extensions.
More information here.