Pipework Integrity Testing

The integrity of every ground loop is critical to the long-term performance of a commercial ground source heat pump system. Onsen provides specialist pipework integrity testing to identify potential issues before commissioning and support successful project delivery.

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Our Testing Process

Every project follows a structured testing process, providing confidence that installed ground loops have been thoroughly verified before handover.

What Sets Onsen Apart

Quality Built In

Pipework integrity testing is backed by robust quality assurance procedures, ensuring testing is carried out consistently and every stage is properly documented.

Clear Project Documentation

Every project is supported by clear, comprehensive documentation, giving contractors, consultants and clients complete visibility throughout the testing process.

Technical Expertise

Commercial GSHP projects demand specialist knowledge. Our experienced team understands the technical requirements of ground loop testing, providing reliable support throughout the testing process.

Reduced Project Risk

Identifying issues before commissioning helps avoid delays, minimise rework and keep projects moving towards successful completion.

How We Work

Working With Us

The standards we hold ourselves to across every project, shaping how we work with clients, partners and project teams.

Responsive Project Support

We coordinate with project teams to minimise disruption and ensure testing is completed when it's needed, helping projects stay on schedule.

Clear Communication

Our team keeps clients informed throughout the testing process, providing prompt updates and straightforward reporting at every stage.

Reliable Delivery

With extensive experience supporting commercial GSHP projects, we deliver dependable testing services that integrate smoothly with wider project programmes.

Recent Projects

Take a look at some of our recent commercial ground source heat pump projects and see how we've supported clients across the UK.

Campus-scale borehole array supporting ground source heating.
Project
Spring 2025

Delivering Low-Carbon Heat at Campus Scale Through Ground Source and Waste Heat Integration

  • 49 boreholes installed  
  • 250 metres depth per borehole
  • Integration with recovered data centre heat

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Borehole drilling for a care home GSHP system in Bedfordshire.
Project
Spring 2026

GSHP Drilling for Care Home Facility in Bedfordshire

  • 12 boreholes drilled
  • 90kW system capacity
  • Potential groundwater risk mitigated

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Urban borehole drilling for a large-scale GSHP project in Central London.
Project
Winter 2025

Large-Scale Ground Source Heat Pump Project in Central London

  • 76 boreholes
  • 18,000+ meters of drilling
  • Overcame challenging access constraints in a dense urban environment

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Off-grid bungalow with a compact ground source heat pump installation.
Project
Spring 2024

Sustainable Off-Grid Living with Onsen Energy and Kensa’s Shoebox NX


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Drilling works for a school and college GSHP installation.
Project
Summer 2024

Sustainable GSHP Drilling Project for UK Secondary School & College

  • Over 1MW installed heating energy
  • Minimal disruption to the live learning environment
  • Maintained a clean site using specialist mud processing and ground protection equipment

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New-build homes in Lewes served by a shared ground source array.
Project
Autumn 2024

32 Zero Carbon 'In Use' Homes with Ground Source Heat Pumps in Lewes

  • 32 affordable rent and shared ownership homes  
  • 15 boreholes
  • Cheaper, greener and more secure energy for residents

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Planning a ground source heat pump project?

Talk to our team about pipework integrity testing, borehole drilling requirements, and project timelines.

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