Sewer Sealing Request for Information

Southern Water is committed to reducing storm overflows and managing the volume of water entering the sewer network. A key part of this strategy involves sealing sewers to limit water infiltration and inflow, helping to protect the environment and improve network resilience. We are inviting suppliers with proven expertise in sewer sealing to participate in this market engagement. The aim is to assess capabilities to deliver planned programmes using recognised industry techniques for sealing groundwater out of pipes such as: • Cured-in-place pipe (CIPP) lining • Pull-in-place liners • Slip-lining • Fold-and-form liners • Full-length polymer coatings • Targeted patch repairs • Packer/resin injection • Chemical/polyurethane grouting • Cementitious grouts • Mechanical joint seals • Manhole rehabilitation • Top Hat Installation • Hot cure methods e.g Inversion, Steam Cure, UV light, LED light. • Other sewer sealing/pathing techniques and innovations • Other sewer sealing/pathing techniques and innovations Information requested • Overview of your experience and proven track record with the major sewer sealing techniques listed (though not exhaustive) above. • Current and forecasted delivery capacity including crews and annual throughput. • Possible geographical split for delivery including any regional offices, depots, or preferred operating areas. • In-house technical capabilities and certifications for CCTV surveying, cleaning, lining, injection grouting, manhole rehabilitation and post-work validation. • Ability to provide turnkey services including traffic management, reinstatement, emergency response and accurate reporting. • Your appetite for sewer sealing supply chain innovation This engagement is separate from the Wastewater Network Services – Lot 4, which focuses on reactive repair and maintenance of live assets. Instead, this initiative is forward-looking, targeting proactive sealing interventions to support our long-term environmental and operational goals. Purpose and scope The objective is to identify contractors able to programme and deliver sewer sealing works at scale, reduce inflow and infiltration, and restore or improve hydraulic and structural integrity across our sewer network. We seek information on supplier capacity, mobilisation readiness, geographic delivery options, and in-house technical capabilities for both pipe and manhole interventions. Tender Tender is planned to commence in late 2025/early 2026 to support planned Sewer Sealing work in AMP8, Contract commencing in 2026.