Underground Pipe Locating Services in Sydney (EM & GPR Specialists)
Accurate Underground Pipe Detection Before You Dig
Before you dig, know exactly where underground pipes are located. Geoscope provides professional pipe locating services across Sydney and NSW to help you avoid costly damage, delays, and safety risks.
or Call 1300 750 350
Why Pipe Locating Is Essential Before You Dig
Any excavation or ground-penetrating work carries the risk of striking underground utility pipes. Damaging water, gas, sewer, or stormwater pipes can result in serious safety hazards, major project delays, and expensive repairs.
Modern underground infrastructure is complex. Pipes are constructed from a wide range of materials and often run alongside electrical and communications services. The days of relying on basic metal detection or assumptions are long gone.
Professional pipe locating ensures underground services are identified and verified before excavation begins, allowing work to proceed safely and confidently.
What Types of Pipes Can We Locate?
Stormwater & Drainage Pipes
Including council and private stormwater systems, pits, and drainage networks.
Water Supply Pipes
Metallic and non-metallic water services, including copper, poly, PVC, and legacy materials.
Gas Pipelines
Low-pressure and high-pressure gas services requiring strict safety controls.
Sewer & Trade Waste Pipes
Sewer mains, private sewer connections, and trade waste infrastructure.
Unknown or Legacy Services
Pipes not shown on DBYD plans or installed prior to modern documentation standards.
(The locating method used depends on pipe material, depth, access points, and surrounding utilities.)
Industry insights
How Pipe Locating Works
1
Dial Before You Dig (DBYD) Review
Before attending site, DBYD plans are obtained and reviewed. DBYD is a free national service that provides indicative underground utility plans from asset owners, typically within 48 hours.
While DBYD plans are an essential first step, they are not guaranteed to be accurate and must be verified on site.
2
On-Site Pipe Detection
Our technicians use a combination of EM locating and GPR to trace underground pipes. This allows us to identify pipe alignment, depth, and potential conflicts with other services.
3
Marking & Verification
Located pipes are clearly marked on the surface. Where required, we provide guidance on safe potholing or non-destructive digging to visually confirm critical services.
Pipe Locating Technology We Use
Electromagnetic (EM) Locating
EM locating is used for conductive pipes such as copper or steel. A transmitter applies a traceable signal to the pipe, allowing the receiver to accurately trace its path and estimate depth.
Different frequencies are used depending on pipe type and site conditions to minimise interference and improve accuracy.
Ground Penetrating Radar (GPR)
GPR is ideal for locating non-conductive pipes such as PVC, plastic, or concrete. It detects subsurface anomalies without requiring direct access to the pipe and can also identify other underground features such as rock, concrete, or voids.
Using EM and GPR together allows us to accurately locate the vast majority of underground pipes.
When Do You Need Pipe Locating?
Pipe locating is recommended for any activity that penetrates the ground, including:
- Excavation and trenching
- Renovations and extensions
- Driveway and landscaping works
- Directional drilling or boring
- Saw cutting and concrete works
- New utility installations
If your project involves breaking the subsurface, pipe locating is essential.
What You Receive
Clear On-Site Markings
Underground pipes are marked clearly and logically on the surface to guide excavation activities.
Alignment & Depth Indications
Where possible, pipe alignment and indicative depths are provided to support safe excavation planning.
Safe Excavation Advice
Guidance on minimum approach distances, hand digging, potholing, and risk controls where required.
AS 5488 (SUI) Compliance
All locating is completed in accordance with AS 5488 — Classification of Subsurface Utility Information.
Managing Excavation Risk & Duty of Care
Accidentally striking an underground pipe can cause serious injury, service disruption, environmental damage, or significant financial loss. Excavation permits and Codes of Practice increasingly require confirmation of actual underground service locations — not just DBYD plans.
By locating and verifying pipes before excavation, you:
1
Protect workers and the public
2
Reduce the risk of delays and shutdowns
3
Meet your legal duty of care
4
Gain confidence to proceed safely
Frequently Asked Questions
Yes. Sewer mains, water services, gas lines, and other utilities can run within residential property boundaries, especially in older or rural areas.
No. DBYD plans are indicative only and must be verified using appropriate locating methods before excavation.
‘Dial Before You Dig’ is a free national service that provides a single point of contact for information about the location of underground utilities at a planned project site. Their job is to prevent any damage and disruption to Australia’s essential infrastructure networks.
Yes, although some require advanced techniques such as GPR, duct rodding, or access via pits or manholes.
Why Choose Geoscope for Pipe Locating?
DBYD-Certified Technicians
Our technicians are trained, certified, and experienced in underground utility locating.
Advanced EM & GPR Equipment
We use reliable, industry-leading locating technology for accurate results.
AS 5488-Compliant Marking
All works are aligned with Australian Standards for subsurface utility information.
Sydney & NSW Coverage
We service residential, commercial, and civil projects across Sydney and NSW.
Geoscope regularly locates pipes and services that do not appear on DBYD plans, helping clients avoid costly surprises.
Our happy customers
Here’s what our clients have to say about our service
Real feedback from architects, developers, and homeowners and many more that we’ve worked with.
Request a Pipe Locating Quote
Avoid delays, damage, and unnecessary risk.
Contact Geoscope before you dig and get your pipes located by experienced professionals.
or Call 1300 750 350
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