Who we are
Radius Subterra delivers comprehensive pipeline engineering services, from installation and live connections to testing, maintenance and rehabilitation.
Radius Subterra is the specialist pipeline engineering arm of the Radius Group, working alongside Radius Systems, Evopipes, RK Infra, CTS and Aeon to deliver integrated pipeline infrastructure solutions.
We support gas, water and biogas networks, delivering pipeline rehabilitation and engineered solutions that span installation, live connections, flowstopping, testing, commissioning and rehabilitation. Through our relationship with Radius Systems, we draw on decades of manufacturing expertise, proven polyethylene (PE) technology and in-house testing capability to ensure high integrity pipeline performance across the asset lifecycle.
Our technical heritage blends long-established Subterra expertise with the broader Radius Group legacy, creating a delivery model built on engineering rigour, problem solving and a strong safety culture. We work collaboratively with clients to understand operational challenges and provide solutions designed to maintain continuity of supply, extend asset life and minimise disruption.
Our capability is further strengthened through close collaboration with specialist partners — FlowStop Services, FlowStop Engineering and MTS Contracting — enabling enhanced expertise in live pipeline isolation, pressure testing, under-pressure work and complex site operations. Together, we provide a comprehensive and coordinated service offering for both planned works and urgent interventions across the UK and beyond.
As part of Radius Group’s end-to-end infrastructure portfolio, we also benefit from access to advanced PE pipelines, district heating systems, smart piping solutions and engineered valves, all manufactured and supplied within the wider group. This ensures that the products we install are supported by deep materials knowledge, testing assurance and a commitment to long-term performance.
With an engineering-led approach, highly trained teams and strong governance, Radius Subterra provides safe, reliable and future-ready solutions that help customers manage, adapt and protect their pipeline infrastructure.
Where we work
Radius Subterra operates across the UK and beyond, delivering specialist pipeline engineering services for gas, water and biogas networks, alongside industry-leading pipeline rehabilitation solutions.
Through the Radius Group’s UK and international footprint, we benefit from access to advanced pipeline products, testing capability and manufacturing expertise, enabling responsive, high-quality delivery wherever we are deployed.
Radius House
Berristow Lane
South Normanton
Alfreton
Derbyshire
DE55 2JJ
Unit 5 Holland Enterprise Park
Holland Way
Blandford Forum
Dorset
DT11 7FQ
Unit 3B2
Brewster Square
Brucefield Industry Park
Livingston
EH54 9BH
Heighington Ln
Newton Aycliffe
DL5 6UE
Unit 10
New Road
Bridgend Industrial Estate
Bridgend
CF31 3UD
Our origins
1987
Subterra was founded as a specialist pipeline rehabilitation operation associated with Thames Water.
1990s
Subterra expands its service offering and becomes a recognised leader in trenchless installation and pipeline maintenance.
1991
Uponor (and Neste) acquire the UK PE pipe business previously owned by DuPont, forming the foundation of the modern Radius Systems.
2000s
Subterra continues to grow, delivering major UK and international utility projects through partners such as Daniels Contractors and Land & Marine.
2002
Uponor creates UPLUS (Uponor Pipeline Utility Services), a specialist division for onsite pipeline installation and connections.
2008
Uponor officially rebrands as Radius Systems, marking a major milestone in the group’s identity.
2008 - 2010
UPLUS transitions to RPLUS (Radius Pipeline Utility Services) as part of Radius Systems’ expanding service offering. Companies House records confirm the name changes through this period.
2009
RPLUS opens its first satellite depot at Radius Systems’ Newton Aycliffe facility.
2013
Radius Plus acquires Subterra, bringing Subterra’s deep utility-service heritage together with Radius Systems’ manufacturing and installation capability.
2020
RPLUS is formally renamed Radius Subterra, unifying the two lineages into a single, specialist pipeline engineering brand within Radius Group.
Today
Radius Subterra now sits alongside Radius Systems, Evopipes, RK Infra, CTS and Aeon as part of Radius Group Holdings, a global provider of pipeline and utility infrastructure solutions operating across multiple regions and markets.
Why choose Radius Subterra?
Trusted expertise, engineered solutions and a service approach shaped around your challenges.
For decades we’ve supported utility networks in the UK and beyond with safe, reliable and efficient pipeline services. Our teams combine technical knowledge, industry-leading equipment and a problem-solving mindset to deliver high-quality outcomes with minimal disruption. Whether planned works or complex operational challenges, we provide proven capability and dependable support.
Decades of expertise
With deep roots across the wider Radius Group and extensive experience in live gas, water, biogas and pipeline rehabilitation operations, our teams bring exceptional hands-on knowledge to every project. We understand the pressures faced by network operators and contractors and deliver work that is safe, compliant and technically robust from start to finish.
Committed to quality and safety
Safety underpins every service we deliver. Our work follows industry standards, rigorous internal procedures and environmental best practice. From accredited techniques to specialist equipment, we ensure consistent quality while reducing risk, waste and unnecessary disruption across gas, water and biogas networks.
Minimising disruption
Our specialist techniques, including under-pressure connections, flowstopping and trenchless rehabilitation, allow essential works to continue while maintaining customer service, protecting highways and minimising community impact. Reduced excavation and streamlined operations, support faster reinstatement and lower overall disruption.
Innovation and customisation
From bespoke branch saddles to tailored fittings for non-standard assets, innovation is central to our approach. We engineer solutions to suit each site, material and operating condition, enabling safer, faster and more cost-effective outcomes across complex project environments.
Safety and sustainability
We champion safe working and long-term sustainability. Our methods reduce carbon, excavation material, traffic disruption and reinstatement, while modern equipment and ongoing training create a safer environment for teams and the public. Every project is designed and delivered with environmental responsibility and operational resilience in mind.
Decades of expertise
With deep roots across the wider Radius Group and extensive experience in live gas, water, biogas and pipeline rehabilitation operations, our teams bring exceptional hands-on knowledge to every project. We understand the pressures faced by network operators and contractors and deliver work that is safe, compliant and technically robust from start to finish.
Committed to quality and safety
Safety underpins every service we deliver. Our work follows industry standards, rigorous internal procedures and environmental best practice. From accredited techniques to specialist equipment, we ensure consistent quality while reducing risk, waste and unnecessary disruption across gas, water and biogas networks.
Minimising disruption
Our specialist techniques, including under-pressure connections, flowstopping and trenchless rehabilitation, allow essential works to continue while maintaining customer service, protecting highways and minimising community impact. Reduced excavation and streamlined operations, support faster reinstatement and lower overall disruption.
Innovation and customisation
From bespoke branch saddles to tailored fittings for non-standard assets, innovation is central to our approach. We engineer solutions to suit each site, material and operating condition, enabling safer, faster and more cost-effective outcomes across complex project environments.
Safety and sustainability
We champion safe working and long-term sustainability. Our methods reduce carbon, excavation material, traffic disruption and reinstatement, while modern equipment and ongoing training create a safer environment for teams and the public. Every project is designed and delivered with environmental responsibility and operational resilience in mind.
Contact us
Ready to progress your next pipeline project?
Radius Subterra’s specialist engineering teams are here to support you with safe, efficient and technically assured solutions across every stage of the asset lifecycle.
Get in touch by phone or email to discuss your requirements and speak directly with our experts.
Alternatively, complete the form below with the relevant information.