Scottish Water has gone out to tender with a framework contract for screens and screenings handling systems with an estimated value of £10 million (ex VAT).
Scope of the framework covers the design, supply, installation, commissioning, and ongoing service and maintenance of screens and screenings handling systems across all Scottish Water operational areas, including remote regions such as the Highlands and Islands.
The scope includes after-sales support, system testing, and operator training, ensuring a fully integrated and reliable end-to-end delivery.
Scottish Water specify that the systems must be designed to ensure continuous, efficient, and compliant operation, supporting the removal, conveyance, and hygienic disposal of screenings in line with the water company’s technical and environmental standards.
Suppliersare also required to provide a minimum warranty period of two years on all equipment and services supplied under the framework.
Standards and requirements
All products supplied under the framework must comply with Scottish Water’s technical requirements, which are subject to periodic updates. Scottish Water point out that suppliers are responsible for ensuring that all equipment and associated processes meet the latest applicable standards throughout the duration of the framework.
Equipment supplied must also conform to:
- Relevant British Standards, including but not limited to BS EN 12255 for wastewater treatment systems
- Water Industry Mechanical and Electrical Specifications (WIMES)
- Dangerous Substances and Explosive Atmospheres Regulations (DSEAR) 2002, updated 2015
All systems must also integrate seamlessly with existing Wastewater Treatment Works (WwTW) infrastructure and SCADA systems and be capable of operating under variable flow and load conditions while maintaining compliance with discharge consents.
The initial contract term is four years with with two further 2-year extensions options.
The contract is being tendered in the following Lots:
- Lot 1: Screens and Screenings Handling - approx £3.5 million for initial 4 years term (£7 million including extensions).
- Lot 2: Sludge Screens and Screenings Handling - approx £1.5 million for initial 4 years term (£3 million including extensions).
Scottish Water said the break points in the contract will allow it to review the market and ensure the product is still fit for purpose and providing value for money.
For both Lots supplier are required to provide all services necessary to deliver the above scope, including:
- Existing asset surveys
- Condition assessments
- Delivery either as a complete turnkey solution or via clearly defined work packages
Close collaboration will be required with Scottish Water’s internal Operations and Maintenance teams, Alliance contractors and framework suppliers. The water company said this collaborative approach is essential to ensure seamless integration with existing infrastructure and operational practices.
Waste disposal activities under the framework must:
- Comply with all relevant legislation
- Be carried out by a licensed waste disposal provider
Suppliers are expected to actively support Scottish Water’s Beyond Net Zero strategy by:
- Minimising waste generation
- Applying circular economy principles—reduce, reuse, recycle
- Minimising waste sent to landfill
The specifications are subject to regular review and updates throughout the framework duration.
Suppliers will also be responsible for providing Works Manuals and Asset Scripts which must be delivered in the format specified by Scottish Water and provided at the same time as the associated equipment. In addition, they must provide information about the names and professional qualifications of staff responsible for the performance of the contract
Scottish Water is looking to put a framework agreement in place with several operators.
Time limit for receipt of tenders or requests to participate is 5:00pm on21 November 2025
The procurement documents, including two separate detailed Pre-Qualification Questionnaires for each Lot and a comprehensive set of guidance notes for the scope, are available at
https://atamis-scottishwater.my.salesforcesites.com/ProSpend__CS_PublicLandingPageSearchType=Projects
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