Non-Destructive Digging (Hydro Excavation) uses high-pressure water and a vacuum system to safely remove soil and expose underground utilities without damage.
Gas mains
Water & sewer lines
NBN & fibre
Power cables
Stormwater assets
NDD is the safest method for exposing underground utilities across Greater Sydney and Regional NSW — essential for civil, infrastructure and reactive repair work where precision and safety are critical.
Our NDD Capabilities
Potholing & Service Locating
Safely expose existing underground services with precision.
Trenching
Narrow, controlled trenches for conduit, pipe and cable installation.
Confined Space & Restricted Access
Specialist excavation in confined and restricted access areas where conventional machinery cannot safely operate.
Emergency Burst Water & Sewer Response
Rapid mobilisation — trusted by Downer Pipetech for Sydney Water reactive work.
Footpath & Road Crossing Excavation
Safe excavation with minimal community disruption.
Slot Trenching
Precision trenching for utility installation, drainage, and service connections.
Our On-Site Process
Arrival and Safety Setup
We mobilise to the site on schedule and conduct a comprehensive risk assessment and safety briefing before work begins.
Establish Controlled Work Zone
We secure the area with appropriate exclusion zones and barriers to ensure safety for the public and site personnel.
Hydro Excavation with High Pressure Water System
Using high-pressure water, we safely break up soil to expose critical underground utilities without risking damage.
Spoil Vacuumed Directly Into Truck
All excavated material is immediately extracted into our vacuum unit, keeping the trench clean and the site congestion-free.
Site Cleaned, Safe and Ready for the Next Trade
We complete a final wash-down and site handover, ensuring the area is safe and ready for immediate access by follow-on trades.
Why Choose Us
Why Us
Prevents damage to buried utilities
Minimises reinstatement & restoration costs
Reduces risk in congested service areas
Compliant with Sydney Water & council requirements
Cleaner and safer than mechanical excavation
EPA-licensed HydroVac fleet — 3,000L compact to 8,000L heavy-duty — operating across Greater Sydney & Regional NSW
Who We Work With
Sydney Water contractors (Downer PipeTech)
Civil & infrastructure contractors
Plumbing & drainage trades
Telecommunications crews
Local councils & government authorities
Frequently Asked Questions
Yes — our 3,000L compact HydroVac unit is purpose-built for confined, tight-access and urban sites including narrow laneways, car parks and congested CBD zones.
Yes — we are available 24/7 including weekends and public holidays. We regularly mobilise for emergency burst mains, sewer failures and other urgent reactive works across Greater Sydney and Regional NSW.
Yes — our HydroVac units can extract sludge, drill mud, liquid slurry and solid spoil generated during excavation. All material is contained in our on-board debris tank and transported to an EPA-approved disposal facility.
Yes — NDD (Hydro Excavation) is the safest method for exposing live underground utilities including gas mains, water pipes, electrical cables and telecom lines. Water pressure is precisely controlled and adjusted by our operators to eliminate the risk of damage to buried assets.
NDD is ideal for utility potholing, service exposure, confined space excavation, slot trenching, pier excavation and emergency repairs. It is widely used by civil contractors, councils, telecommunications crews, plumbers and water authority contractors across Australia.
All spoil — including slurry and drill mud — is contained in our vacuum truck and transported off-site. Clean material may be returned to the excavation or taken to a recycling facility. Contaminated material is disposed of at an EPA-licensed regulated waste facility with full documentation.
ASB Vac Services are a proudly Australian owned company who strives to ensure our customers are met with the upmost professionalism and quality of service.
