CIPP, pipe bursting, slip-lining, and microtunneling contractors rehabilitating water and sewer mains without excavation.

    Find a Trenchless Pipe Rehabilitation Provider

    Matched providers: 46

    Top countries: United Kingdom, Belgium

    Popular technologies: Acid Dosing Systems, Aerated Lagoons, MABR

    Trenchless Pipe Rehabilitation: CIPP, Slip Lining, and Pipe Bursting for Water and Sewer Mains

    Trenchless pipe rehabilitation installs structural or semi-structural lining or replacement pipe inside existing deteriorated mains without open excavation, minimising traffic disruption, surface reinstatement cost, and construction time. Methods broadly fall into: lining techniques (CIPP - cured-in-place pipe; slip lining; spray lining); pipe replacement (pipe bursting, pipe eating/milling); and point repair systems (lateral connection re-establishment, patch lining). Primary driver: UK and European water and wastewater networks include millions of kilometres of aging Victorian cast iron, brick, pitch fibre, and pre-1990 PVC pipes requiring rehabilitation to restore structural integrity and prevent leakage. WRc Sewerage Rehabilitation Manual (5th edition) and Water UK Pipe Rehabilitation Technical Guidance Note (TGN) provide assessment and method selection frameworks. UK trenchless market: estimated GBP 1 to 1.5 billion per year for water and wastewater pipe rehabilitation; AMP8 (2025 to 2030) includes significant increases in sewer rehabilitation funding driven by WINEP (Water Industry National Environment Programme) and CSO reduction targets.

    Cured-in-place pipe (CIPP) lining is the most widely used trenchless sewer rehabilitation method globally. Process: a flexible resin-impregnated felt liner (polyester, fibreglass, or carbon fibre composite; thickness 4 to 35 mm) is inserted into the host pipe by inversion (water or air pressure from an end access point) or pull-in method; the liner is cured in-situ by hot water, steam, UV-light, or ambient cure depending on resin type (epoxy, polyester, vinyl ester, or aqueous UV-cure resins); cured liner forms a continuous new pipe within the host pipe with no joints or annular space. Standards: BS EN ISO 11296 series (Part 1: General, Part 4: CIPP specifically); ASTM F1216; UK WRc SRM specifies liner wall thickness design basis (structural or semi-structural role). Applicable host pipes: DN 150 to DN 3000 mm; circular or egg-shaped profiles; house connections re-opened by robotic cutter post-lining (remote-controlled cutter restores branch connections). Benefits: continuous joint-free lining (zero leakage path at joints); maintains hydraulic capacity (smooth CIPP surface Manning's n approximately 0.010 vs deteriorated brick n = 0.015 to 0.025); 50-year design life per BS EN 13566; avoids excavation under live roads or railways. Limitations: structural host pipe required (unless using fully-structural CIPP design); access for end-to-end liner pull-in at maximum 200 to 600 m intervals.

    Pipe bursting and pipe eating replace deteriorated pipes with new pipes of equal or larger diameter. Pipe bursting (pneumatic or static pull): a bursting head (cone-shaped expander) is pulled through the existing pipe by a pulling machine; the old pipe is fractured radially and displaced into the surrounding soil; a new HDPE pipe (PE100, SDR11 or SDR17) is simultaneously pulled in behind the bursting head. Applicable to: brittle pipes (clay vitrified, concrete, grey cast iron, AC - asbestos cement); not suitable for ductile iron or steel mains (pipe bursting requires brittle fracture). Upsize factor: typically 1 to 2 pipe sizes increase possible (e.g. DN 150 to DN 200); limited by soil displacement capacity. Pipe eating (moling, microtunnel replacement): for upsizing where existing pipe can be milled/ground away by a cutter head ahead of new pipe installation. Slip lining (continuous pipe or segmental): new continuous PE pipe pulled or pushed through existing host pipe; annular space between new and host pipes grouted with cementitious or PU foam for structural transfer; reduces bore by 5 to 15 percent. GRP (glass-reinforced plastic) segmental slip lining: structural GRP segments installed by CCTV-guided remote manipulation for large-diameter applications (DN 900 to DN 3000 culverts and sewers).

    Frequently Asked Questions

    What is CIPP lining and how long does it last?

    Cured-In-Place Pipe (CIPP) lining installs a resin-impregnated flexible liner inside an existing pipe to form a new, smooth, continuous pipe wall. Process: liner (polyester felt saturated with liquid resin) is inverted into the pipe using water or air pressure from one access point; liner pressed against host pipe walls during curing; curing agent: hot water (80 to 95 degrees C), steam (110 to 130 degrees C), or UV light (for UV-cure systems) activates resin cross-linking, hardening the liner into a rigid pipe in 1 to 6 hours; access point is cut open; lateral connections re-opened by remote cutter robot. Liner design life: BS EN ISO 11296-4 specifies 50-year design life for structural CIPP; well-installed CIPP liners demonstrate 30+ years in service in UK and European sewers from 1990s installations without structural deterioration. Liner thickness design: calculated from ring stiffness required for independent structural performance (fully deteriorated host pipe cannot contribute to load bearing); typical sewer liner thickness: DN 225 sewer under 1.5 m road fill: 6 to 8 mm; DN 600 at 4 m depth: 12 to 18 mm; structural design per BS EN ISO 11296-4 Annex A. Hydraulic performance: CIPP Manning's n approximately 0.009 to 0.011; hydraulic capacity improvement over roughened brick/concrete sewer (n 0.013 to 0.025); most sizes maintain or improve flow capacity despite bore reduction.

    When is trenchless rehabilitation preferred over open-cut pipe replacement?

    Trenchless rehabilitation is preferred over open-cut replacement in most situations due to cost and disruption advantages: Cost comparison: CIPP lining typically GBP 150 to 600 per linear metre (depending on diameter, depth, access) vs open-cut replacement GBP 500 to 2,000+ per linear metre including excavation, backfill, and reinstatement; in urban areas: open-cut requires traffic management, temporary road closures (GBP 5,000 to 50,000 per day in London), and full carriageway reinstatement at GBP 80 to 200/m2 - often triples the effective pipeline replacement cost. Speed: trenchless lining 20 to 200 m per day vs open-cut 5 to 30 m per day for large diameter. Preferred trenchless scenarios: (1) Underneath live roads, railway, or structures where excavation disruption or risk is unacceptable; (2) Continuous lining requirement for leakage or structural integrity over long sections; (3) Pipe with relatively intact profile but deteriorated condition; (4) Urban areas with high reinstatement costs and traffic sensitivity. Preferred open-cut scenarios: (1) Severe deformation or collapse where CIPP cannot navigate bends or deformations greater than 15 percent bore reduction; (2) Pipe requiring upsize more than 1 to 2 pipe sizes (pipe bursting limited); (3) Combined sewer rehabilitation with channel reconstruction or benching modifications at the same time; (4) Shallow pipes under unpaved land where excavation cost is low. UK guidance: CIRIA Report C679 (Sewers - Inspection, Assessment and Renewal) provides decision framework for rehabilitation vs replacement selection.

    Can trenchless methods be used for water mains?

    Yes, trenchless methods are extensively used for water main rehabilitation and replacement: (1) CIPP for water mains: DWI-approved epoxy or polyester CIPP liners for potable water mains (BS 6920 extraction testing required; DWI Regulation 31 approval); used in cast iron mains DN 100 to DN 600; restores structural integrity and eliminates tuberculation (iron corrosion nodules); reduces iron discolouration complaints; typical applications: Victorian-era cast iron mains with heavy tuberculation, pitting, or joint leakage; (2) Spray lining (cement mortar): most common water main rehabilitation for UK water companies; DN 75 to DN 900; centrifugally applied cement mortar lining 3 to 9 mm thick (BS EN 15655, AWWA C602); inhibits iron leaching and provides smooth hydraulic surface (Manning's n 0.010 vs tuberculated iron n 0.015 to 0.035); no reduction in bore capacity (mortar fills tuberculation voids); WRAS/DWI approved; life expectancy 30 to 50 years. CIRIA TGN on Structural Relining of Water Mains; (3) Slip lining with PE100: continuous HDPE pipe inserted with grout annulus; used for large-diameter trunk mains; (4) Pipe bursting: replacement of grey cast iron or AC mains with PE100 in same trench path; upsize DN 100 to DN 150 common; (5) Swaged or fold-and-formed PE: PE pipe thermally deformed to smaller diameter for push/pull insertion, springs back to fill host pipe bore after installation; used in water industry for long insertions without grout annulus.

    What is the cost of CIPP lining compared to open-cut replacement?

    Cost comparison (UK market, 2024 price levels): CIPP lining: DN 225 sewer, 2 m depth, urban road: GBP 200 to 400 per linear metre (liner + installation); DN 450, 3 m depth: GBP 400 to 700/m; DN 900, 4 m depth: GBP 1,000 to 2,000/m. CIPP costs include: liner material (typically 50 to 60 percent of total), curing equipment mobilisation, CCTV survey pre and post, access manhole modifications. Open-cut sewer replacement (same pipe sizes, urban road): DN 225, 2 m depth: GBP 800 to 1,500/m; DN 450, 3 m depth: GBP 1,500 to 3,000/m; DN 900, 4 m depth: GBP 3,000 to 6,000/m. Open-cut costs include: excavation and shoring, pipe supply (HDPE or vitrified clay), bedding material, backfill and compaction, full-width road reinstatement (GBP 80 to 200/m2 carriageway), traffic management, utility diversions. CIPP cost advantage: typically 30 to 60 percent less than open-cut replacement for sewers in urban roads; greater saving ratio in busier streets (higher traffic management and reinstatement cost). Spray lining (cement mortar): DN 150 water main, typical UK water company: GBP 40 to 120 per linear metre; very low disruption; most cost-effective water main rehabilitation for iron mains without structural failure. Full life cycle cost assessment: open-cut replacement provides longer design life (100 years for new HDPE vs 50 years for CIPP); in whole-life cost analysis, CIPP may still be preferred where disruption cost and NPV of deferred replacement are factored in.

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    Trenchless Pipe Rehabilitation Companies

    CIPP, pipe bursting, slip-lining, and microtunneling contractors rehabilitating water and sewer mains without excavation.

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    Find a Trenchless Pipe Rehabilitation Provider

    Showing 1-20 of 46

    46 results from 46 matched providers

    Ecosystems International logo

    Ecosystems International

    Verified
    Indonesia51-200 employees
    Flat Sheet Microfiltration Units · Hollow Fiber MF Systems · Ceramic Microfiltration Modules +80 more
    apac · china · europe +3 more

    PT Ecosystems International (PT ESI) was established at Jakarta on 21st November 2006. We are an industrial effluent treatment systems integrator specializing in electrocoagulation (EC), a unique waste water treatment profile. PT ESI has capabilities in designing complete waste water treatment solutions by combining various effluent treatment systems such as the electro-coagulation, biological, chemical processes and membrane filtration, offering its customers a wide and comprehensive range of solutions, tailored to suit their various needs – ranging from basic effluent treatment for discharge to effluent recycling for water reuse. The Company is experienced in handling the design, engineering, procurement, construction and operation of new Effluent Treatment Plants (“ETP”) and possesses expertise in retrofitting existing ETP to increase the flow rate and treatment capability without any major infrastructure increase PT ESI is also a premier waste water treatment service company specializing in handling waste water generated from Exploration (Drilling) and Produced Water. Customers in Indonesia include major Oil & Gas companies such as Pertamina, Exxon, Chevron, Petro-China and Medco. Operations in Indonesia are provided by both mobile and fixed units. At drill sites where waste-water recycling is required, PT ESI supplement these treatment units with skid mounted mobile Reverse Osmosis systems. The technologies and solutions employed by PT ESI are developed in-house and examples of these are its proprietary Trident™ Electro Contaminant Removal (“ECR”) system, the Stage Contaminant Removal (“SCR”) process and Mobile On-Site Waste-Water Treatment (“OWT”) units

    Reverse Osmosis (RO) Systems
    Ultrafiltration (UF) Systems
    Multi-media Filtration (MMF) Systems
    +63 more
    agriculture
    manufacturing
    DALI - Pipeline Monitoring logo

    DALI - Pipeline Monitoring

    Belgium1-50 employees
    europe

    DALI - Pipeline Monitoring specializes in advanced real-time leak and intrusion detection for pipelines using Distributed Acoustic Sensing (DAS) and fiber optic technology. Their solutions help utility companies and industrial facilities minimize Non-Revenue Water (NRW) losses, reduce waste, and prevent costly incidents, ensuring efficient pipeline management.

    Online/Real-Time Monitoring
    Remote Sensing and Telemetry
    IoT and Smart Monitoring
    Utilities
    Public Administration
    Amiblu UK LTD logo

    Amiblu UK LTD

    United Kingdom

    If you knew there was a material out there with a proven track record worldwide for outperforming others, would you want to know more about it? Using cutting edge technology to meet the toughest challenges, Amiblu manufactures GRP pipelines and storage systems that last for generations and do not corrode. GRP is a resilient, composite material utilised in many aspects of construction and civil engineering to deliver long lasting infrastructure. The history of Amiblu’s GRP systems starts with the first production of centrifugal cast (CC) pipes in Basel in 1957 and continuous filament wound (FW) pipes in 1969 in Norway using top quality raw materials combined with glass fibres to create robust pipes and storage solutions. Over the past 60+ years, research and development, growth and investment now puts Amiblu at the forefront of GRP pipe production, with seven state of the art manufacturing facilities and a global network of licensed partners producing the two market leading names in GRP pipes – Flowtite (FW) and Hobas (CC). Amiblu takes environmental responsibility very seriously by developing systems that offer a number of benefits to asset owners who are faced with aging networks, growing cities, climate change and increases in demand. Challenging traditional materials, our products are corrosion and abrasion resistant, with excellent hydraulics, can be bespoke made to meet project requirements, are low-maintenance and engineered for 150 years’ service life. Products are manufactured for: Sewage & stormwater Hydropower Circular & non-circular pipeline rehabilitation Potable & raw water delivery Industrial processes Micro-tunnelling applications. The greenest product is the one you don’t have to replace.

    Networks - Water Supply
    Asset Maintenance & Rehabilitation
    APL Construction Ltd logo

    APL Construction Ltd

    United Kingdom

    APL Construction was incorporated in February 2011 by Aidan Langan. The company headquarters are in South Lanarkshire, Scotland. APL Construction currently employs about 40 members of staff. The company turnover for 2023 was just over £5m. APL work mainly on Scottish Water projects however we have also carried out works on Severn Trent and Northumbrian Water projects. APL are capable in both water and wastewater sectors and carry out all the aspects of civil engineering required in these fields. The company continues to grow year on year and invests heavily each year on staff training, premises, fleet, plant, and equipment. The company currently has over £1m worth of owned plant at its disposal. Capabilities include: Cofferdams Deep drainage Concrete structures Groundworks Rising mains Butt fusion Pressure testing Ductile installations Ducting Cable laying Roadways Hard landscaping Additional information can be found on our website.

    Networks - Sewerage
    Accreditations
    Barhale logo

    Barhale

    United Kingdom

    Barhale is a civil engineering and infrastructure specialist with more than 40 years’ experience in the construction industry. Founded by chairman, Dennis Curran in 1980, the group was originally set up as a tunnelling contractor. While retaining its tunnelling roots, repeated success across several sectors of the construction industry has enabled the company to expand to become one of the largest privately-owned infrastructure experts in the UK. We work UK-wide across the water, energy, transport and built environment sectors providing design, construction and maintenance services under long-term contracts with blue chip public, regulated and private clients. The company has an outstanding reputation for the range of specialist skills it possesses to support its civil engineering and infrastructure activities including MEICA and a steel-fabrication and supply subsidiary.

    Networks - Water Supply
    Asset Maintenance & Rehabilitation
    Technocover Ltd logo

    Technocover Ltd

    United Kingdom

    Technocover is an approved ISO 14001:2004 Environmental and ISO 9001:2008 Quality Accredited Company, dedicated to the Design, Manufacture, Installation and Maintenance of Physical Security Access Solutions for protection to all industrial sectors. Our extensive in-house design and manufacturing facilities are home to well established research and development unit and comprehensive testing facility. Our commercial offices incorporate our design team who utilise the latest computer aided design technology and work alongside our dedicated planning section who oversee everything from surveying, scheduling and contract reviews, to the management of framework agreements. We have been designing and manufacturing innovative steel products since 1993. In that time, through organic growth, planned expansion and acquisition, we have gained a reputation as the UK’s leading supplier of Physical Steel Security Access Products. We have a range of aperture security solutions for virtually every application, establishments in the UK and overseas have sought our expertise in providing security products for asset protection. We operate a Total Service Philosophy and can handle complete projects from site survey to final installation, whether for new or refurbishing projects, the adaptability of our galvanised steel access products means the most complex design criteria can be met. Our range of high quality access products offer custom built operational and security solutions to prevent unauthorised persons gaining access, securing key assets against all levels of trespass, malicious vandalism, theft, extortion, contamination or terrorism. Many of our access system products have been tested and approved by the Loss Prevention Certification Board (LPCB)  to LPS 1175 issue 5 or above, Security Rating Levels 2, 3, 4 or 5. Frameworks We hold both exclusive and shared framework agreements with most of the major UK water companies. Framework Security items include: LPCB Level 2 Universal Gas Cylinder Clamps LPCB Level 3 Mesh Cage Systems LPCB Level 3 Flush Access Covers LPCB Level 4 Upstand Access Covers LPCB Level 4 Padlockable Access Doors LPCB Level 4 Key Entry Doors LPCB Level 4 Enclosures/Kiosks/Cabinets LPCB Level 4 Walk-In Modular Buildings LPCB Level 4 Window Bar Sets LPCB Level 5 Louvres

    Security Solutions
    Asset Maintenance & Rehabilitation
    AVK UK Ltd logo

    AVK UK Ltd

    United Kingdom

    AVK UK is part of the globally renowned AVK Group who are based in over 100+ countries and has over 4,500+ employees worldwide. The AVK Group is privately owned by the founder Niels Aage Kjaer, and is named after his father Aage Valdemar Kjaer. As part of the AVK Group, we pride ourselves in being one of the leading valve manufacturers for the water, sewage, firefighting, and gas industries. Our product program comprises a large range of valves, hydrants, pipe fittings and accessories, each complying with the highest standards of safety and durability. Our focus is on the products designed and manufactured to the British Standards, however, the AVK Group today offers products in accordance with the most national and international standards. Our product portfolio also includes AVK Smart Water Management valves and sensors for real-time network information and status. We also offer Pressure Management solutions such as air valves, PRVs, and control valves, AVK Assist which enables GPS product location and, the market leading Donkin PUR range of gas valves. Our UK sales offices and manufacturing sites respond quickly to the needs of our customers and for fittings required on an express or emergency service we have a dedicated same day 24/7 helpline – 0800 202 8228. In addition, we cooperate with local and national distributor partners to offer our customers AVK products as part of multi-product packages. AVK UK is the sales division and has offices in Staveley, near Chesterfield, also known as the home of Bryan Donkin gas valves, and Northampton. AVK in the UK comprises of 7 companies and has over 500 employees. Find out more here: https://www.avkuk.co.uk/en-gb/solutions-and-information/about/avk-in-the-uk/avk-uk

    Treatment Works Products/Services
    Asset Maintenance & Rehabilitation
    Cadman Cranes Ltd logo

    Cadman Cranes Ltd

    United Kingdom

    Cadman Cranes is a leading provider of lifting solutions in the UK with over 50 years’ experience and a reputation for quality, reliability and safety. At the very forefront of sustainability within the industry, Cadman Cranes offer responsible and collaborative turn-key solutions across all industries. From depots in Colchester and Brentwood, Cadman is ideally positioned to cover the East of England and beyond, living and breathing its mission to provide safe lifting solutions to industry and communities in a collaborate, considerate and sustainable way. Cadman has always placed great importance on delivering so much more than just crane hire. Its values are focussed on the success of its clients, its people and its community, and it takes great pride in going the extra mile on every job, no matter how big or small. Cadman Cranes add value to your hard work and offer a full-service lifting solution that goes far beyond just crane hire. It doesn’t just look for customers, it looks for partnerships based on trust, quality and safety. Services include: Contract lift services: Our complete package service is ideal for those who require a fully managed lifting solution, removing your risk and liability, and ensuring that we deal with all of the ‘heavy lifting’. Crane hire services: Cadman Cranes is the leading crane rental company in the East of England, providing crane hire across London, Essex, East Anglia, and all over the UK. With cranes available 24/7, 365 days a year, we are well positioned to keep your operations moving. Tank clearance, dredging, and grab solutions: Cadman Cranes offers innovative tank clearance solutions with our custom-designed grab attachment. The remote-controlled grab, mounted to the hooks of our mobile cranes, can reach up to 60 meters and handle a variety of materials, including sewage waste, sludge, grit, mud, and sand. This service is ideal for wastewater treatment plants, sewage facilities, digester tanks, aeration tanks, ports, and any industrial sites that require regular tank cleaning, maintenance, or dredging. Specialist lifting equipment for utility installation projects: Utilising our range of specialist lifting equipment, we have assisted on some of the most complex utility installation projects throughout the East of England, solving problems currently unimaginable by other mobile crane hire companies. Our innovative Compact Crawler Cranes, in combination with our remote-controlled telescopic hydraulic grab, have proved invaluable in providing the highest level of service and crane hire to the utilities sector. If you would like to work with Cadman Cranes or are looking to add a safe and considerate crane hire solution to your list of approved suppliers, Cadman would love to hear from you.

    Asset Maintenance & Rehabilitation
    Siltbuster Group logo

    Siltbuster Group

    United Kingdom

    Established for over 20 years, the Siltbuster Limited provides rapidly deployable, “modular off the shelf” water treatment solutions to the construction, industrial and municipal markets, with a client base ranging from the world’s most recognisable multi-national corporations to small enterprises. Siltbuster provides a wide range of water and wastewater treatment equipment for the industrial and municipal markets, including: Packaged lamella dissolved air flotation (DAF) units. Lamella clarifiers. Packaged biological treatment systems. Oil/water separators. Pipe flocculators. Reaction tanks. Containerised dosing systems. In the UK, Siltbuster has pioneered the concept of offering this plant through our extensive hire fleet. Approximately 20 major contracts and circa 50 smaller projects are undertaken each year for a diverse range of clients, many of which are some of the UK’s best-known companies. In addition to the industrial/municipal sector, Siltbuster has undertaken a number of mine water treatment projects in many countries, for example, the UK, Ireland, Greece, France, USA, Canada, Australia and Slovakia. The Siltbuster team pride themselves in their ability to react rapidly and in compliance with the project constraints, delivering mobile or permanent solutions tailored to meet your individual needs.

    Treatment Process Technologies
    Asset Maintenance & Rehabilitation
    Greenbank Group logo

    Greenbank Group

    United Kingdom

    A specialist engineering company with a global customer base. Greenbank provides a wide range of products and services to companies operating across a number of industries and is now establishing itself in the clean and wastewater sector. For many years the company has utilised the unique properties of volcanic basalt for lining products used in heavy industries such as power generation and minerals extraction. In partnership with Czech firm Eutit, the company has also been pioneering the use of basalt in the renovation and restoration of sewer systems in central European following a series of successful projects in Prague. As a result of devastating floods, the city’s sewer system was extensively rebuilt and upgraded with basalt being used in a number of key locations to provide a new level of security to the system. More than a decade on, the new system continues to perform well and has set a standard that’s now been followed in other European cities. Well suited for the most demanding of applications, thanks to the partnership between Greenbank and Eutit, a wide range of basalt solutions are now available in the UK market. These include products and systems that bring a wide range of benefits to the industry, including: Basalt tiles that can also be used to line existing brickwork, a more cost-effective solution than full replacement, and their reduced drag co-efficient means improved flow – in effect a smaller-diameter pipe or tunnel lined with basalt can carry a higher volume of water than a larger one with traditional brick surfaces. The effective life expectancy of basalt-lined sewer systems is between 100 and 200 years, thanks to their excellent resistance to abrasion and chemical damage – as well as the rigours of high-pressure water jetting that’s often used to clear unwanted blockages. For larger round or ovoid systems, basalt can be used in the lower sections to deal with the wear and tear with concrete upper sections to provide optimum life performance. Alternatively, steel pipes lined with basalt can be produced up to 3000mm diameter producing a lighter therefore lower cost installation option to thick wall concrete. Ease of installation and reduced maintenance costs make basalt ideal for bottom gutters, branch pipes and tubes and slip-resistant elements for walkways, and Greenbank can also supply bespoke-shaped tiles to meet the unique requirements of individual clients. With manufacturing facilities in Derbyshire and Nottinghamshire, supported by the additional capacity and expertise provided by the latest addition to the group, Franklyn Yates Engineering, Greenbank is well placed to react quickly and efficiently to the needs of new and existing clients.

    Headlight AI Limited logo

    Headlight AI Limited

    United Kingdom

    Headlight AI is a UK based technology company developing sensing, mapping, and inspection solutions for extreme environments. The company works primarily with Utility companies and contractors to provide condition assessment and geo-location data in subterranean locations, especially for large diameter assets (such as sewers, culverts, and tunnels with diameters >900mm), with a focus on autonomous or semi-autonomous systems that avoid the need for person-entry (in particular NC3 or NC4 confined space entry), improving workers’ health and safety. The company supplies its award winning product, Telesto, to utility companies and contractors in order for them to collect multi-sensor data, including LiDAR, on either robotic or floating platforms. The data is then processed to account for the motion of the system and to produce 3D point cloud and multi-image data for further analysis. Users can access the information via the web-based Telesto application, which provides condition assessment dashboards and statistics relevant to the asset, achieved using novel artificial intelligence (AI) models. The company currently has several other products and features in development to further assist with underground inspections and surveys, and provide new ways to navigate and locate in GPS-denied and extreme environments.

    Smart Water
    Asset Maintenance & Rehabilitation
    3rd Light Media Ltd logo

    3rd Light Media Ltd

    United Kingdom

    3rd Light Media provide technical documentation and design services for water and wastewater projects, both in the UK and internationally. We provide a range of documentation for projects, helping clients achieve their handover requirements and producing high quality documents which provide the end users with the information they need to operate and maintain the plants. We are a market leader in driving digital innovative solutions to our clients to ensure documentation is presented in new and dynamic ways, this includes development of web-based O&M manuals which can integrate with client I.T. systems such as SharePoint; Graphical design to enable data and documentation of assets on a site plan or P&ID to be available within just a few clicks of a button. Additionally, we have developed a QR coded asset tagging system and mobile App. Our services mean we can provide our clients with a single source for all handover documentation requirements. The services we can provide include: Operating and Maintenance Manuals (O&Ms) Site Operating Manual (SOM) Health & Safety Files Asset Data Registration Training Manuals Site Drawings (P&IDs, Process Flows, Site Layouts and Plans, GA’s, Single Line Diagrams and more) AutoCAD Drafting Services Additionally, we also provide a range of onsite services to further enhance being a one stop provider for all your project handover needs. Some of the onsite services we provide include: Asset Identification Tags (to meet all individual client specifications) Pipe Banding to BS1710 Site signage and labelling We also provide a range of design and pre-construction services, with experience when working with Tier 1 contractors at ECI / Outline Design stages of projects including: Functional Design Specifications Control Philosophies Factory Acceptance & Site Acceptance Tests for Software Testing Commissioning Plans and Sequencing Asset Condition Reports Verification Survey Works (Producing P&IDs, ICA and Electrical Design Proposals) We work as an integrated team with both contractors and clients to ensure all aspects of project handover are achieved to the highest standard. We are able to do this with our vast knowledge of individual water companies asset standards and specifications. We are also experienced in using portals such as TWEXnet, Asite, Aconex, Business Collaborator and Conject for uploading documents. Our team comprises of skilled and experienced site and process engineers with a vast knowledge of both water and wastewater treatment systems. Our team of engineers all hold EUSR Water Hygiene and CSCS cards as well as water company specific requirements such as the Thames Water Safety Passport. We also have an in-house graphic design team providing professionally drawn illustrations and drawings which are used within our documentation, helping to visualise written descriptions and processes. Our philosophy is to take the burden of producing documentation on projects away from our clients. Being skilled process engineers, we will visit sites to gather information and we work with your supply chain to coordinate the availability of all required documents and drawings, ensuring compliance with the end clients standards. We write all the technical content and detail to the highest standard, supported by expertly drawn diagrams and illustrations. Some of the water companies we have worked with include: Thames Water Affinity Water Yorkshire Water Southern Water Severn Trent South East Water United Utilities Welsh Water Bristol Water Essex & Suffolk Water Irish Water Haya Water We work both directly with water companies and Tier 1 and Tier 2 contractors. We work on projects of all sizes, from minor schemes to major £100+ million projects.

    Treatment Works Products/Services
    Accreditations
    Concrete Repairs Ltd logo

    Concrete Repairs Ltd

    United Kingdom

    Concrete Repairs Limited (CRL) is a specialist asset maintenance contractor who is here to help you with the inspection, repair & refurbishment of your concrete water assets. CRL provide comprehensive repair and refurbishment services tailored to the needs of the water and wastewater sector throughout the UK. These include the inspection, repair, refurbishment and upgrading of service reservoirs, contact tanks, water towers & wastewater treatment plants. With over 65 years of experience, CRL understands the importance of maintaining water quality and supply to customers. Therefore, when planning repairs, we prioritise effective programming of the work and optimal utilization of the assets being repaired. Our choice of repair methodologies and materials always reflects this commitment. At CRL, we pride ourselves on being a reliable partner to the water companies. We collaborate closely with them to identify problems early, quantify the necessary repairs, and establish a timeline for refurbishment. Throughout this process, we focus on ensuring the longevity and optimal performance of the assets. CRL provide proven and successful cost-effective repair and refurbishment options which meet our clients’ objectives of upgrading and increasing the life of their structures. CRL is capable of undertaking individual projects of up to £20M, either under competitive tender, or through Partnering/Framework arrangements. Our broad experience across various sectors ensures we deliver efficient, robust, and technically advanced services.

    Asset Maintenance & Rehabilitation
    Sewer Inspections
    Intelect logo

    Intelect

    United Kingdom

    At Intelect, we have over 25 years experience in providing engineering expertise to clients in process industries. Intelect have worked with Northumbrian Water and its Tier 1 suppliers and partners for over a decade, and during this time, we have provided services in design, electrical installation, control panels and pipework services. Our attention to detail, quality, and attitude to Health and Safety has been consistently recognised by our clients over the years, with us receiving numerous awards for the projects we have completed. Our flexible workforce of apprentices, engineers and project managers allows us to efficiently complete any project to our client’s requirements. On-going innovation and investment in our business means that we have the latest training and technology to execute high quality engineering projects, from design through to commissioning, all whilst maintaining best practices in Health and Safety. Intelect are committed to working in partnership with both contractors and suppliers within the utility sector, sharing our expertise and knowledge to help support companies who provide utilities to homes and businesses across the North East and the rest of the country.

    Networks - Water Supply
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    Hydro International logo

    Hydro International

    United Kingdom

    Hydro International, a CRH company,  provides advanced products, services and expertise to help municipal, industrial and construction customers to improve their water management processes, increase operational performance and reduce environmental impact. Hydro International can help water companies meet their AMP and environmental obligations, including the reduction of sewer overflows and the Water Industry National Environment Programme (WINEP). Hydro International provides total solutions for Inlet Works, Combined Sewer Overflows (CSOs), Stormwater Management, Flood Warning and Prevention, and Water Resource management, from design to supply and installation through to ongoing preventative maintenance, servicing and emergency repair.  These solutions include: Hydrometric data collection, monitoring analysis and reporting for river level, reservoir, network and weather. Continuous water quality monitoring for compliance with Section 82 of the Environment Act. Water resource analysis and consultancy. Stormwater management solutions, including options for Sustainable Drainage Systems. (SuDS) and Smart Maintenance. CSO event duration monitoring. CSO and storm tank treatment and screening. Passive flow controls for flood prevention schemes, SuDS, CSOs and WwTWs. Inlet works screening and grit removal solutions. Sludge screening. Dropping sewage or water safely from height. Hire, repair and maintenance of inlet works screens and screenings handling equipment

    Networks - Sewerage
    Asset Maintenance & Rehabilitation
    Total Automation & Power logo

    Total Automation & Power

    United Kingdom

    Total Automation & Power (TAP) is a formal joint venture between Cougar Automation Ltd and Technical Control Systems Ltd. Formed in 2005, it has delivered hundreds of projects worth tens of millions of pounds. Current water and wastewater frameworks include Severn Trent, Thames, Welsh & Yorkshire Water. Working with TAP is just like working with a single company. Every project has a dedicated project manager who coordinates all the work and gives you a single point of contact. You place a single order for all of your electrical and control system design, supply and installation so you can concentrate on delivering your project without having to worry about placing and managing separate orders for MCCs, a control system and electrical installation. Unlike separate orders, both companies stand behind the whole scope and unlike a contract/sub-contract arrangement we don’t mark up each other’s price. Projects are easy to manage, secure and competitively priced. Supporting clients from initial concept design stage through to on-site commissioning, TAP collaborates with clients at every stage to evaluate designs to optimise TOTEX outcomes. When you choose TAP as your partner you get an unrivalled combination of expertise: Control System, SCADA & PLC expertise from Cougar Automation in six regional offices throughout the UK. MCC, low voltage assembly and panel expertise from Technical Control Systems’ manufacturing facility in Leeds.

    Networks - Sewerage
    Asset Maintenance & Rehabilitation
    Active Tunnelling Ltd logo

    Active Tunnelling Ltd

    United Kingdom

    As an industry leader since 1994, Active Tunnelling Ltd (ATL) is the UK’s most experienced independent, micro-tunnelling, auger boring, shaft sinking and pipe jacking company offering a comprehensive range of services to the water and civil engineering industries across the UK & Ireland. More than just a tunnelling company ATL delivers all encompassing projects solutions: whether it is a segmental shaft or complete project management from ‘tunnel’ to final landscaping, ATL delivers flexible, and tailor made solutions to suit any brief. ATL prides itself on its long list of clients that includes amongst others the UK’s leading construction companies and is proud to claim total satisfaction on every job. A dedicated and highly skilled/experienced sixty strong team are at the core of ATL’s success, this weight of experience backed by the UK’s largest independent specialist plant enables ATL to deliver on time every time. Services Our comprehensive range of services allows us to satisfy even the most demanding brief, even with short lead times you can place your trust in us leaving you to focus on other aspects of the project. Tunnelling and pipejacking: 1,000mm – 2,400mm diameter. Micro-tunnelling: 150mm – 900mm diameter. Auger boring: 150mm – 725mm diameter. Grouting. Shaft sinking. Cover slab construction. Timber headings. ATL offer Professional management team with over 30 years experience. Quick mobilisation to site. Technical support/design where required. Achilles UVDB Verify approved company. Quality Assured ISO 9001:2008 Registered Firm Cert. No. A11969. Fast response to enquiries. Fast and efficient service maintaining a high standard of safety. Specialist trenchless plant. A completed project to a high quality at a reasonable price. A willingness to work as one team with all parties to ensure satisfaction.

    Networks - Water Supply
    Contractors
    envolve infrastructure logo

    envolve infrastructure

    United Kingdom

    We are envolve - specialist civil engineers. We build, maintain, and renew the infrastructures that keeps our country running, and have done since 1984. Our vision is to surpass our clients’ expectations on every project. Not just to deliver, but to excel. Our passion for our work means we naturally go the extra mile. Our focus is on building long-term partnerships and achieving genuine collaboration, this is how we measure our success. We hold ourselves accountable to these exceptional standards and continue to innovate so we remain ahead of the game. Our service, culture and heritage, underpins our ability to be the best. We’re proud of our track record, but it’s our constant investment in our directly employed specialist people that keeps us at the forefront of our industry. We’re dynamic, we evolve with the times, and we maintain our unrivalled knowledge and craftsmanship. Collaboratively, pro-actively and sustainably. Our VISION: To be the UK’s leading delivery partner. Known for our community engagement, ultimate employee satisfaction, safe and sustainable vision, and being the absolute best at what we do. Our CAPABILITIES Heavy civil engineering Clean water pipelines Wastewater treatment Wastewater pipelines Renovation Trenchless technology Dam safety Reactive/emergency ‘on call’ services Highways Rail Our QUALIFICATIONS BMTRADA (9001, 14001, 45001) Achilles Constructionline Gold ROSPA Gold Medal Award Further information on our people, our projects and clients are available on our website www.envolve-infrastructure.co.uk.

    River & Coastal Flood Protection
    Contractors
    AJ Engineering & Construction Services Ltd logo

    AJ Engineering & Construction Services Ltd

    United Kingdom

    AJ Engineering & Construction Services Ltd provide a wide spectrum of engineering services ranging from steel fabrication and CNC machining to cladding and civil engineering, with our highly experienced team we provide on-time, on-budget quality solutions. From our bases in Forres and Fort William, and a team accustomed to travel we can meet our client’s needs wherever required. Having worked on various water and wastewater treatment projects for the past 25 years we have developed a great working relationship with water companies across the UK. Our in-house capabilities allow us to offer a turnkey service to our clients from reactive maintenance and manufacturing to planned infrastructure and non-infrastructure projects. Many of the projects we undertake in the water sector are within water treatment and wastewater treatment plants where cleanliness is paramount, all our water sector site teams hold certification and Water Hygiene cards. Our range of services collated into one means that we can take on multiple discipline contracts and deliver them as one which provides our clients with a number of advantages. It removes the need to have multiple contractors on site at once. Benefits in cost savings passed down on procuring large amounts of steel for a side wide project. Little risk of dimensional discrepancies between contractors We work alongside framework delivery partners throughout the UK providing the services below; Steel portal frame buildings (design, fabrication, erection & cladding) Design, manufacture and installation of pipe bridges Design, manufacture and installation of site wide access metalwork (walkways, access stairs, ladders etc) Design, manufacture and installation of modular water buildings transportable by road. Design of various process tanks, pipework and pumps. Fabrication of tanks and pipework (stainless and carbon) Mechanical Installation Modular Treatment Buildings and Mechanical Fit-out SR2 rated steel enclosures (quicker than GRP Kiosks) We appreciate how important quality and cleanliness is in the water sector and we are proud that we have completely segregated facilities for stainless steel and carbon steel. In addition to this we are also approved under the regulations 31(4)(A) of the water supply regulations 2016 to supply stainless steel and pipework fabrications to the drinking water sector.

    Networks - Sewerage
    Asset Maintenance & Rehabilitation
    GEDA Construction logo

    GEDA Construction

    United Kingdom

    GEDA Construction is a leading Building and Civil Engineering Company. Our technical expertise coupled with a committed personal approach has contributed to our continued success in the delivery of high quality projects. Since the 1970’s GEDA has been providing a comprehensive building and civil engineering services offering construction excellence to private and public sector clients across the UK and Ireland. We specialise in water and wastewater infrastructure including reservoirs, water and wastewater treatment works, shafts, tunnels and pipelines as well as educational, residential, community and industrial markets. With expertise across a wide variety of disciplines, we provide our clients with innovative and imaginative solutions that meet their needs in a safe, sustainable and cost-effective way.

    Networks - Sewerage
    Asset Maintenance & Rehabilitation
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    Trenchless Pipe Rehabilitation: CIPP, Slip Lining, and Pipe Bursting for Water and Sewer Mains

    Trenchless pipe rehabilitation installs structural or semi-structural lining or replacement pipe inside existing deteriorated mains without open excavation, minimising traffic disruption, surface reinstatement cost, and construction time. Methods broadly fall into: lining techniques (CIPP - cured-in-place pipe; slip lining; spray lining); pipe replacement (pipe bursting, pipe eating/milling); and point repair systems (lateral connection re-establishment, patch lining). Primary driver: UK and European water and wastewater networks include millions of kilometres of aging Victorian cast iron, brick, pitch fibre, and pre-1990 PVC pipes requiring rehabilitation to restore structural integrity and prevent leakage. WRc Sewerage Rehabilitation Manual (5th edition) and Water UK Pipe Rehabilitation Technical Guidance Note (TGN) provide assessment and method selection frameworks. UK trenchless market: estimated GBP 1 to 1.5 billion per year for water and wastewater pipe rehabilitation; AMP8 (2025 to 2030) includes significant increases in sewer rehabilitation funding driven by WINEP (Water Industry National Environment Programme) and CSO reduction targets.

    Cured-in-place pipe (CIPP) lining is the most widely used trenchless sewer rehabilitation method globally. Process: a flexible resin-impregnated felt liner (polyester, fibreglass, or carbon fibre composite; thickness 4 to 35 mm) is inserted into the host pipe by inversion (water or air pressure from an end access point) or pull-in method; the liner is cured in-situ by hot water, steam, UV-light, or ambient cure depending on resin type (epoxy, polyester, vinyl ester, or aqueous UV-cure resins); cured liner forms a continuous new pipe within the host pipe with no joints or annular space. Standards: BS EN ISO 11296 series (Part 1: General, Part 4: CIPP specifically); ASTM F1216; UK WRc SRM specifies liner wall thickness design basis (structural or semi-structural role). Applicable host pipes: DN 150 to DN 3000 mm; circular or egg-shaped profiles; house connections re-opened by robotic cutter post-lining (remote-controlled cutter restores branch connections). Benefits: continuous joint-free lining (zero leakage path at joints); maintains hydraulic capacity (smooth CIPP surface Manning's n approximately 0.010 vs deteriorated brick n = 0.015 to 0.025); 50-year design life per BS EN 13566; avoids excavation under live roads or railways. Limitations: structural host pipe required (unless using fully-structural CIPP design); access for end-to-end liner pull-in at maximum 200 to 600 m intervals.

    Pipe bursting and pipe eating replace deteriorated pipes with new pipes of equal or larger diameter. Pipe bursting (pneumatic or static pull): a bursting head (cone-shaped expander) is pulled through the existing pipe by a pulling machine; the old pipe is fractured radially and displaced into the surrounding soil; a new HDPE pipe (PE100, SDR11 or SDR17) is simultaneously pulled in behind the bursting head. Applicable to: brittle pipes (clay vitrified, concrete, grey cast iron, AC - asbestos cement); not suitable for ductile iron or steel mains (pipe bursting requires brittle fracture). Upsize factor: typically 1 to 2 pipe sizes increase possible (e.g. DN 150 to DN 200); limited by soil displacement capacity. Pipe eating (moling, microtunnel replacement): for upsizing where existing pipe can be milled/ground away by a cutter head ahead of new pipe installation. Slip lining (continuous pipe or segmental): new continuous PE pipe pulled or pushed through existing host pipe; annular space between new and host pipes grouted with cementitious or PU foam for structural transfer; reduces bore by 5 to 15 percent. GRP (glass-reinforced plastic) segmental slip lining: structural GRP segments installed by CCTV-guided remote manipulation for large-diameter applications (DN 900 to DN 3000 culverts and sewers).

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    Frequently Asked Questions

    What is CIPP lining and how long does it last?

    Cured-In-Place Pipe (CIPP) lining installs a resin-impregnated flexible liner inside an existing pipe to form a new, smooth, continuous pipe wall. Process: liner (polyester felt saturated with liquid resin) is inverted into the pipe using water or air pressure from one access point; liner pressed against host pipe walls during curing; curing agent: hot water (80 to 95 degrees C), steam (110 to 130 degrees C), or UV light (for UV-cure systems) activates resin cross-linking, hardening the liner into a rigid pipe in 1 to 6 hours; access point is cut open; lateral connections re-opened by remote cutter robot. Liner design life: BS EN ISO 11296-4 specifies 50-year design life for structural CIPP; well-installed CIPP liners demonstrate 30+ years in service in UK and European sewers from 1990s installations without structural deterioration. Liner thickness design: calculated from ring stiffness required for independent structural performance (fully deteriorated host pipe cannot contribute to load bearing); typical sewer liner thickness: DN 225 sewer under 1.5 m road fill: 6 to 8 mm; DN 600 at 4 m depth: 12 to 18 mm; structural design per BS EN ISO 11296-4 Annex A. Hydraulic performance: CIPP Manning's n approximately 0.009 to 0.011; hydraulic capacity improvement over roughened brick/concrete sewer (n 0.013 to 0.025); most sizes maintain or improve flow capacity despite bore reduction.

    When is trenchless rehabilitation preferred over open-cut pipe replacement?

    Trenchless rehabilitation is preferred over open-cut replacement in most situations due to cost and disruption advantages: Cost comparison: CIPP lining typically GBP 150 to 600 per linear metre (depending on diameter, depth, access) vs open-cut replacement GBP 500 to 2,000+ per linear metre including excavation, backfill, and reinstatement; in urban areas: open-cut requires traffic management, temporary road closures (GBP 5,000 to 50,000 per day in London), and full carriageway reinstatement at GBP 80 to 200/m2 - often triples the effective pipeline replacement cost. Speed: trenchless lining 20 to 200 m per day vs open-cut 5 to 30 m per day for large diameter. Preferred trenchless scenarios: (1) Underneath live roads, railway, or structures where excavation disruption or risk is unacceptable; (2) Continuous lining requirement for leakage or structural integrity over long sections; (3) Pipe with relatively intact profile but deteriorated condition; (4) Urban areas with high reinstatement costs and traffic sensitivity. Preferred open-cut scenarios: (1) Severe deformation or collapse where CIPP cannot navigate bends or deformations greater than 15 percent bore reduction; (2) Pipe requiring upsize more than 1 to 2 pipe sizes (pipe bursting limited); (3) Combined sewer rehabilitation with channel reconstruction or benching modifications at the same time; (4) Shallow pipes under unpaved land where excavation cost is low. UK guidance: CIRIA Report C679 (Sewers - Inspection, Assessment and Renewal) provides decision framework for rehabilitation vs replacement selection.

    Can trenchless methods be used for water mains?

    Yes, trenchless methods are extensively used for water main rehabilitation and replacement: (1) CIPP for water mains: DWI-approved epoxy or polyester CIPP liners for potable water mains (BS 6920 extraction testing required; DWI Regulation 31 approval); used in cast iron mains DN 100 to DN 600; restores structural integrity and eliminates tuberculation (iron corrosion nodules); reduces iron discolouration complaints; typical applications: Victorian-era cast iron mains with heavy tuberculation, pitting, or joint leakage; (2) Spray lining (cement mortar): most common water main rehabilitation for UK water companies; DN 75 to DN 900; centrifugally applied cement mortar lining 3 to 9 mm thick (BS EN 15655, AWWA C602); inhibits iron leaching and provides smooth hydraulic surface (Manning's n 0.010 vs tuberculated iron n 0.015 to 0.035); no reduction in bore capacity (mortar fills tuberculation voids); WRAS/DWI approved; life expectancy 30 to 50 years. CIRIA TGN on Structural Relining of Water Mains; (3) Slip lining with PE100: continuous HDPE pipe inserted with grout annulus; used for large-diameter trunk mains; (4) Pipe bursting: replacement of grey cast iron or AC mains with PE100 in same trench path; upsize DN 100 to DN 150 common; (5) Swaged or fold-and-formed PE: PE pipe thermally deformed to smaller diameter for push/pull insertion, springs back to fill host pipe bore after installation; used in water industry for long insertions without grout annulus.

    What is the cost of CIPP lining compared to open-cut replacement?

    Cost comparison (UK market, 2024 price levels): CIPP lining: DN 225 sewer, 2 m depth, urban road: GBP 200 to 400 per linear metre (liner + installation); DN 450, 3 m depth: GBP 400 to 700/m; DN 900, 4 m depth: GBP 1,000 to 2,000/m. CIPP costs include: liner material (typically 50 to 60 percent of total), curing equipment mobilisation, CCTV survey pre and post, access manhole modifications. Open-cut sewer replacement (same pipe sizes, urban road): DN 225, 2 m depth: GBP 800 to 1,500/m; DN 450, 3 m depth: GBP 1,500 to 3,000/m; DN 900, 4 m depth: GBP 3,000 to 6,000/m. Open-cut costs include: excavation and shoring, pipe supply (HDPE or vitrified clay), bedding material, backfill and compaction, full-width road reinstatement (GBP 80 to 200/m2 carriageway), traffic management, utility diversions. CIPP cost advantage: typically 30 to 60 percent less than open-cut replacement for sewers in urban roads; greater saving ratio in busier streets (higher traffic management and reinstatement cost). Spray lining (cement mortar): DN 150 water main, typical UK water company: GBP 40 to 120 per linear metre; very low disruption; most cost-effective water main rehabilitation for iron mains without structural failure. Full life cycle cost assessment: open-cut replacement provides longer design life (100 years for new HDPE vs 50 years for CIPP); in whole-life cost analysis, CIPP may still be preferred where disruption cost and NPV of deferred replacement are factored in.

    Case Study·Sewer rehabilitation, West Yorkshire
    Challenge

    A sewerage undertaker in West Yorkshire needed to rehabilitate 4.2 km of brick combined sewer (DN 1050, egg-shaped profile, built 1898) running beneath a busy city centre retail street. The sewer served 28,000 PE and was assessed at WRc SRM Structural Grade 4 (major deformation) over 800 m of the worst sections. Open-cut replacement under the retail street was estimated at GBP 8,400 per metre including full carriageway reinstatement and 12 weeks of street closures per 100 m section.

    Approach

    A fully structural GRP spray lining system (Centriline, 12 to 18 mm liner thickness) was selected for the deformed sections (DN 1050, Grade 4 structural). UV-cured CIPP (Brawoliner UV, polyester felt, 12 mm nominal liner, vinyl ester resin) was used for the remaining 3.4 km of Grade 2 to 3 condition (semi-structural). All work was conducted from existing manholes with no surface disruption beyond temporary traffic management for manhole access. Robotic cutters reinstated 340 lateral connections post-lining. Pre and post-lining CCTV with WRc coding confirmed structural grade improvement to Grade 1 throughout.

    Outcome

    Total project cost GBP 2.8 million (GBP 667 per metre average) versus the open-cut equivalent of GBP 35.3 million (GBP 8,400 per metre). Traffic disruption reduced from an estimated 52 weeks of street closures to 6 days of controlled lane closures for manhole access. The lined sewer achieved its 50-year design life certification under BS EN 13566. The DWF hydraulic capacity was maintained within 2 percent of pre-lining values due to the improved Manning's n of the GRP and CIPP surfaces.

    Questions to Ask Shortlisted Providers

    1. 1

      What is the structural classification (semi-structural or fully structural) of the proposed lining, and what condition does it assume the host pipe is in?

      Semi-structural lining relies on the host pipe for load-bearing contribution; if the host pipe continues to deteriorate, the liner's design life is compromised; fully structural lining must be specified for Grade 4 to 5 host pipes.

    2. 2

      What liner thickness has been designed, and to which standard (BS EN ISO 11296-4 or WRc SRM) has the structural calculation been performed?

      Liner thickness is calculated from depth, soil load, groundwater pressure, and host pipe condition; an underthick liner will not achieve its stated 50-year design life and may fail at lower loads than designed.

    3. 3

      How are lateral connections reinstated after lining, and what is the unit cost for robotic lateral cutting?

      Combined sewers typically have 5 to 15 laterals per 100 m; reinstatement at GBP 200 to 600 per lateral can represent 10 to 25 percent of total project cost; this is frequently excluded from headline lining prices.

    4. 4

      For water main lining, what DWI/WRAS approval does the liner material hold, and can you provide the approval certificate?

      Liners for potable water mains must be approved under DWI Regulation 31 (BS 6920 extraction test); using a liner without current approval is a regulatory breach that can result in supply suspension.

    5. 5

      What CCTV coding standard is used for pre and post-lining surveys, and will you provide WRc-coded digital recordings and defect logs?

      WRc condition grade coding is the standard for UK sewers; without pre-lining grade data, the basis for liner design cannot be verified; post-lining surveys confirm lateral reinstatement and liner integrity.

    What Drives Cost in This Category

    Sewer diameter and liner thickness

    CIPP liner cost scales approximately with diameter squared (larger diameter requires thicker liner for structural performance); DN 225 liner GBP 150 to 300 per metre; DN 900 liner GBP 900 to 1,800 per metre; material cost typically 50 to 60 percent of total installed cost.

    Structural versus semi-structural classification

    Fully structural lining (host pipe assumed to contribute zero load capacity) requires 20 to 40 percent more liner material than semi-structural; this adds GBP 40 to 200 per metre depending on diameter and depth.

    Curing method

    UV-cured CIPP is typically 10 to 20 percent more expensive per metre than hot-water-cured; UV systems offer faster curing (1 to 3 m/min versus 0.5 to 1 m/min for hot-water), reducing total operation time and traffic management cost in congested areas.

    Traffic management and street reinstatement

    Open-cut alternative in a prime city-centre retail street can cost GBP 150 to 300 per m2 for full carriageway reinstatement plus GBP 5,000 to 30,000 per day in business interruption costs; trenchless methods eliminate this, which is typically the primary economic justification for CIPP.

    Key Regulations & Standards

    BS EN ISO 11296-4 (CIPP) and BS EN 13566

    BS EN ISO 11296-4:2018: specification for CIPP lining of gravity sewers; structural design, materials, installation, and testing requirements; 50-year design life when designed, installed, and tested per standard. BS EN 13566: structural liner performance criteria including ring stiffness, liner homogeneity, and long-term creep modulus.

    WRc Sewerage Rehabilitation Manual 5th Edition

    The SRM (WRc, 2017) is the UK standard for sewer condition assessment (structural grade 1 to 5, service grade 1 to 5), rehabilitation method selection, and design; used by all UK water companies for CAPEX planning and tender specification; CIPP liner thickness must be designed per SRM structural design spreadsheet.

    Sewers for Adoption 7th Edition

    SfA 7th edition (Water UK, 2020): trenchless rehabilitation of sewers proposed for adoption must comply with SfA structural and hydraulic requirements; CIPP liner design life and structural classification must be documented at adoption stage.

    DWI Regulation 31 for Water Main Lining

    Water Supply (Water Quality) Regulations 2016 (England), Regulation 31: CIPP and spray liners for potable water mains must be tested under BS 6920 and hold current DWI approval; approval is product-specific (resin type, liner composition, and thickness range); approval does not automatically extend to reformulated products.

    Explore Related Categories

    Specific Methods

    CIPP Lining CompaniesHorizontal Directional Drilling (HDD) CompaniesManhole Rehabilitation Companies

    Pipe Suppliers

    HDPE Pipe CompaniesGRP / FRP Pipe CompaniesPrecast Concrete Pipe & Manhole Companies

    Network Services

    Leak Detection CompaniesNon-Revenue Water (NRW) Reduction CompaniesPressure Management Companies

    Browse the full provider directory

    Comparing trenchless pipe rehabilitation companies is one slice of a larger shortlisting decision. Explore the complete directory of wastewater treatment companies, then filter by region, sector, and technology before you request scoped proposals.

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