Leak-testing services

Tender description

Thames Water Utilities Ltd intends to award one or more agreements for the provision of services of surveying of transfer and principal mains for the detection, quantification and monitoring of leaks. This will apply across all Thames Water regions and bidders can apply for one or more lots. The lots being offered are: Lot 1: Invasive Leak Detection Services; Lot 2: Correlation Leak Detection and Monitoring Services. This service covers the whole of the Thames Water supply region, however we reserve the right to award multiple contracts and split the award into sub-regions if deemed appropriate at tender stage. Thames Water reserves the right to make no award as a result of this procurement process, or may award in part or in whole. The initial term of the framework agreement will be 3 years with an option to extend up to a maximum of 8 years subject to assessed performance. Thames Water has over 3 900 km of trunk mains across the estate where currently 12 % of these have specific access points for the insertion of leak detection equipment. The scope of this framework will therefore require the service provider to provide fully trained and competent teams for the surveying and identification of leaks within trunk mains in the Thames Water Region. The service provider will use an insertion device for the purpose of identifying leaks. Any invasive leak detection technology must be able to fit within pre-installed access points no bigger than 80 mm in width and can operate within water flows of 0,2 m/s and higher. The planning and scheduling work will be carried out by Thames Water. The scope of this lot is to conduct thorough correlation surveys to highlight potential leaks on trunk mains with diameters 300 mm (12”) and above across the Thames Water region. The surveys will be carried out by connecting sensors to suitable fittings over the distance of the main (distances should be kept between 200 m-500 m per correlation survey where possible).