Water Services
Radius Subterra delivers specialist pipeline engineering services for potable and non-potable water networks.
Our certified teams perform controlled live operations, precision isolation, asset renewal and full commissioning support, ensuring network integrity, operational continuity and compliance with industry standards.
Flowstopping
We deliver engineered flowstopping for pressurised water mains using squeeze-off and mechanical line stopping systems. Operation planning and execution follows industry standards to control network pressures while enabling repairs, maintenance, diversions, or new infrastructure connections.
Pipeline Repair & Maintenance
Our teams carry out structural and non-structural pipeline repairs across a wide range of materials, including Rolldown and Subline rehabilitation techniques. Our teams replace hydrants, valves, and ageing assets and perform encapsulation and leak repairs. All works follow strict water quality and hygiene protocols to maintain system compliance.
Under Pressure Connections
We perform controlled under-pressure drillings on live water mains to create new supplies, reinforcements, or bypass arrangements without service interruption. Our teams work across polyethylene (PE) and metallic networks using approved branch saddles, mechanical tees, and valves with sterile procedures to maintain network integrity.
Pipework Installation & Mainlaying
Radius Subterra installs polyethylene and metallic water pipelines across a range of diameters using accredited butt-fusion, electrofusion, and mechanical jointing techniques. We handle installation, jointing, testing, chlorination, and integration of new pipework into existing networks, delivered to DWI requirements and water utility engineering specifications.
Pressure Testing
Our technicians perform hydrostatic pressure testing, chlorination, disinfection, and full commissioning to BS EN and WIS standards. We log data, certify results, and verify water quality to ensure pipeline assets are fully compliant and operational.
Pipe Cutting
Using approved cold-cutting pipeline systems, we perform circumferential and longitudinal cuts on ductile iron, cast iron, steel, and polyethylene (PE) mains. This spark-free method allows precise pipe exposure, removal, and sectional replacement during rehabilitation or diversion works.
Manufacture & Fabrication
We design and manufacture bespoke polyethylene (PE) and metallic fittings for water network operations. We precision-engineer steel components and manufacture all items under controlled welding, machining and QA procedures. We enable rapid, compliant and site-ready solutions for complex, high-pressure or non-standard project requirements.
Engineering & Project Management
Radius Subterra manages projects end-to-end, overseeing all engineering, planning and delivery in-house. We conduct design reviews, risk assessments, construction sequencing, and temporary works planning while providing dedicated site supervision. Our integrated approach ensures safe execution, full compliance, and seamless project execution.
Pipe Lining
Radius Subterra delivers trenchless pipe lining solutions for potable and non‑potable water mains, restoring integrity, improving hydraulics and extending asset life. Using close‑fit and spray‑applied lining systems, we rehabilitate ageing pipelines with minimal excavation, disruption and environmental impact.
Pre-Insulated Pipework
Radius Subterra installs, repairs and replaces pre‑insulated pipework for potable and non‑potable water infrastructure. Our solutions support temperature‑controlled processes, treatment facilities and specialist water applications, delivering reliable thermal containment while protecting pipeline integrity and long‑term network performance.
Case Studies
Discover the prowess of Radius Subterra through our latest case studies.
Witness how we excel in tackling intricate pipeline challenges with innovative solutions and state-of-the-art technology. Stay tuned for more videos showcasing our commitment to engineering excellence.
Faced with severe leaks in a critical 1500mm trunk main, Radius Subterra provided an innovative pipeline rehabilitation solution using their close-fit PE liner system. This approach restored the pipeline’s integrity
Discover how Radius Subterra’s precision engineering revitalises a historic London waterway with cutting-edge pipeline solutions, installing a bespoke branch saddle onto a live water main in Finsbury Park. This job
Radius Subterra partnered with Anglian Water to solve leak issues in a hard-to-reach 10” water pipeline in East Anglia. Using their innovative Rolldown & Slipline method, Subterra maximised pipe bore
Case Studies
Discover how Radius Subterra delivers safe, innovative and technically assured solutions across the UK’s most challenging pipeline environments.
Faced with severe leaks in a critical 1500mm trunk main, Radius Subterra provided an innovative pipeline rehabilitation solution using their close-fit PE liner system. This approach restored the pipeline’s integrity
Discover how Radius Subterra’s precision engineering revitalises a historic London waterway with cutting-edge pipeline solutions, installing a bespoke branch saddle onto a live water main in Finsbury Park. This job
Radius Subterra partnered with Anglian Water to solve leak issues in a hard-to-reach 10” water pipeline in East Anglia. Using their innovative Rolldown & Slipline method, Subterra maximised pipe bore
What our client’s say about us
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