Australia’s Leader in Vacuum Microtunnelling and Gravity Sewer Installation

Smarter Technology. Faster Results. Unmatched Precision.

Edge Underground is a specialist trenchless contractor delivering precision vacuum microtunnelling solutions for gravity sewer, water and utility pipelines across Australia. Using AdaptX, the world’s most advanced small-diameter microtunnelling system, and AdaptX technology on all our machines, we provide cleaner, faster and more accurate installations in all ground conditions including rock, mixed ground and water-charged environments.

About Edge Underground

Pioneering Trenchless Technology in Australia and Beyond

Led by Stuart Harrison, inventor of the AdaptX and the original Vermeer AXIS systems, Edge Underground has set new standards for precision and efficiency in trenchless construction. With more than two decades of experience and thousands of metres successfully installed, our team continues to lead the evolution of vacuum microtunnelling worldwide.

What We Do

Precision Pipeline Installation

Gravity sewer, stormwater, and water pipelines.
Small- to medium-diameter installations (350 mm to 1500 mm and beyond).
Direct installation in rock, eliminating oversize bores and liners.
Minimal surface disruption through keyhole trenchless construction.

Vacuum Microtunnelling Technology

Powered by AdaptX, designed and built in Australia by OptionX Group.
Vacuum spoil removal — no slurry, no augers, no mess.
±5–10 mm grade accuracy for gravity-critical pipelines.
Compact setup, faster delivery and a lower environmental footprint.

Safety and Sustainability

Non-man-entry systems and remote operation.
ISO 45001, 14001 and 9001 compliance.
Reduced spoil, minimal water use and low-carbon operation.

About AdaptX

AdaptX: The Future of Microtunnelling

Developed by Edge Underground’s parent company, OptionX Group, and operated exclusively by Edge Underground in Australia, AdaptX is the next generation of trenchless technology.

It uses vacuum extraction to remove spoil with precision, enabling clean, dry bores through even the hardest rock.

AdaptX is proven to deliver faster, safer, and more sustainable results and is setting a new global benchmark for microtunnelling performance.

More about AdaptX

About OptionX Group

Part of something bigger

Edge Underground is part of the OptionX Group, an a collection of companies serving the drilling, boring and tunnelling industry, including:

OptionX Bournedrill – manufacturing and engineering excellence.
Riteline – advanced casing spacers and centralisers.
AdaptX – Advanced microtunnelling machines.
PerforatorX – German engineered, Australian-made drill rods
Drillit International – equipment ownership and leasing.

This integrated structure ensures that every Edge Underground project benefits from Australian-made technology, local manufacturing support, and a culture of continuous innovation.

More about OptionX Group