Drainage Network Investigations Across Scotland
Specialist drainage network investigations using CCTV surveying, sonde tracing, dye testing and GNSS mapping to establish drainage routes, connections, condition and defects. Envirotech Drainage Solutions supports contractors, consultants, developers, facilities managers, utilities and public-sector organisations with clear site findings and practical technical reporting.
Establishing What Is Happening Below Ground
Drainage records are often incomplete, inaccurate or no longer representative of the network on site. Unidentified pipework, unclear connections, recurring issues and restricted access can make it difficult to plan construction, maintenance or repair work with confidence.
Envirotech carries out coordinated drainage network investigations to determine how foul and surface-water systems are arranged, where pipework runs, what individual assets connect to and whether defects or restrictions are affecting performance.
Rather than relying on one survey method, we combine the most appropriate investigation techniques for the site. This allows information gathered through CCTV, locating equipment, dye testing, physical inspection and GNSS surveying to be reviewed together and presented as one clear picture of the drainage network.
Clients requiring a standalone condition assessment can also learn more about our CCTV drain surveys and GNSS/GPS drainage mapping services.
Drainage Problems, Defects & Unknown Pipework We Investigate
- Recurring blockages and restricted flow
- Slow-draining toilets, sinks and showers
- Persistent drain or sewage smells
- Wastewater backing up within the system
- Cracked, displaced or collapsed pipework
- Root ingress, scale and grease build-up
- Leaking drains and unexplained damp
- Unknown drainage routes and connections
- Buried or unidentified access points
- Suspected drainage misconnections
- Incomplete or inaccurate drainage records
- Drainage issues affecting extensions, alterations or development works
How We Investigate Drainage Networks
CCTV Drain Surveys
Push-rod and mainline crawler camera systems are used to inspect accessible pipework, record condition and follow connections through the network. Survey footage and observations can be reported using WinCan where required.
Sonde Tracing and Electronic Locating
Camera sondes and specialist locating equipment allow underground pipe routes, connection points and indicative depths to be marked from the surface.
Dye and Connectivity Testing
Different-coloured tracing dyes can be introduced at selected fixtures, gullies, downpipes or chambers to confirm where flows travel and which network receives the discharge.
GPS & GNSS Drainage Mapping
Located manholes, chambers, gullies and other assets can be surveyed using GNSS equipment to create accurate, usable drainage records and drawings.
Manhole and Assest Inspections
Accessible chambers are inspected to record pipe sizes, directions, depths, condition and connectivity. This information is correlated with the CCTV, tracing and testing results.
Cleaning & Access Preperation
Where debris or restrictions prevent a reliable inspection, targeted high-pressure water jetting or pipe cleaning can be undertaken before the investigation continues.
Our Drainage Investigation Process
1. Scope and Information Review
We discuss the problem, required outcome and site constraints before reviewing any available drainage drawings, asset records and previous survey information.
2. Site Investigation
The network is accessed from suitable manholes, chambers, drainage fixtures and other available points. CCTV surveying, tracing, dye testing and physical inspection are then completed as required.
3. Verification and Mapping
Findings from each investigation method are compared to verify routes, connections, flow directions, asset locations and areas requiring further attention.
4. Reporting and Recommendations
The client receives the agreed survey information, marked-up drawings, footage, photographs and practical recommendations for any further cleaning, surveying or remedial work.
Clear Findings for Informed Decisions
The purpose of a drainage network investigation is to turn uncertain below-ground information into evidence that can be used for design, maintenance and project planning.
Depending on the agreed scope, our deliverables can include:
- WinCan CCTV survey reports and recorded footage
- Drainage condition observations and defect locations
- Marked-up site plans showing confirmed routes and connections
- GNSS-surveyed asset locations
- Pipe directions, diameters and available depth information
- Sonde-traced routes and indicative depths
- Dye-testing results and connectivity findings
- Manhole, chamber and asset photographs
- PDF drainage drawings and CAD-compatible information where agreed
- Recommendations for cleaning, repair or further investigation
Reports can be tailored to suit contractors, consulting engineers, facilities teams, developers and asset owners.
Where the investigation identifies damaged pipework, displaced joints or localised defects, our Drain Repairs & No-Dig Solutions service can provide the next stage of remedial work.
Drainage Network Investigations for Projects & Existing Sites
Developments and Civil Engineering
Pre-construction investigations, connection verification, existing-network surveys and drainage information to support design and site works.
Commercial and Industrial Sites
Investigation of complex private drainage systems, recurring operational problems, unknown assets and incomplete site records.
Facilities and Property Management
Targeted investigation of leaks, blockages, flooding, misconnections and drainage performance across occupied buildings and estates.
Utilities and Public Infrastructure
Network tracing, chamber inspections, asset verification and technical reporting to support planned programmes and infrastructure works.
A Complete Drainage Investigation Capability
- Push-rod and mainline crawler CCTV systems
- Sonde tracing and specialist locating equipment
- Dye testing and drainage connectivity investigations
- GNSS/GPS asset surveying and network mapping
- WinCan reporting capability
- Practical drainage cleaning and remedial knowledge
- CHAS Elite accredited and NADC member
- Experience supporting contractors, utilities and public-sector programmes
- Available for projects across the Central Belt and throughout Scotland
Envirotech combines CCTV surveying, dye testing, sonde locating and drainage mapping within one coordinated investigation service. This helps reduce gaps between separate surveys and gives clients a clearer understanding of the network, the identified issue and the most appropriate next action. Where incorrect or unknown connections are suspected, our investigations can also help identify potential misconnections in line with Scottish Water guidance.
Frequently Asked Questions
What is a drainage network investigation?
A drainage network investigation uses methods such as CCTV surveying, sonde tracing, dye testing, asset inspection and GNSS mapping to establish how a below-ground drainage system is arranged and identify any defects or connectivity issues.
Can you trace a drain when no drawings are available?
Yes. Where suitable access is available, CCTV sondes and electronic locating equipment can be used to trace underground pipework from the surface. Dye testing and inspection of surrounding chambers can provide additional confirmation.
Can you identify whether a pipe is foul or surface water?
In many cases, connectivity can be established by combining dye testing, flow observations, CCTV surveying and inspection of the receiving manholes. The investigation method will depend on the site’s access and drainage arrangement.
Does the drainage need to be cleaned before it is surveyed?
Not always. However, heavy debris, grease, scale, roots or standing silt can restrict camera access and obscure the pipe condition. Where necessary, targeted cleaning can be completed before surveying continues.
What information will we receive after the investigation?
Deliverables are agreed before work begins and may include CCTV footage, WinCan reports, photographs, marked-up plans, surveyed asset locations, connectivity findings and recommendations for further work.
Can investigations be completed out of hours?
Yes. We can arrange out-of-hours works where normal operations, traffic conditions, public access or site restrictions make this necessary.
Do you provide emergency drain unblocking?
Yes. Network investigations are generally planned works, but urgent blockages and drainage emergencies are covered through our 24/7 Drain Unblocking service.
Do you cover all of Scotland?
Yes. Based in Bathgate, Envirotech supports drainage investigations across the Central Belt and throughout wider Scotland.
Need a Clearer Picture of Your Drainage Network?
Based in Bathgate, West Lothian, Envirotech provides CCTV drainage surveys, network investigations and drainage mapping across Edinburgh, Glasgow, West Lothian, Lanarkshire, Stirlingshire, Midlothian, Fife and throughout Scotland.
Whether you are investigating a single property, commercial site, development or larger drainage network, we can tailor the survey scope around the information you need and provide clear findings to support maintenance, repair or future works.