S104 / S106 drain surveys
Professional CCTV drainage surveys to support sewer adoption, connection works and project handover.
Clearflow Surveys works with developers, groundworkers and contractors across the UK, providing clear survey reports, defect identification and supporting CCTV evidence for new development drainage.
S104 Sewer Adoption Surveys
Section 104 drainage surveys are used to inspect newly constructed foul and surface water drainage that is intended for adoption by the relevant sewerage company.
A detailed CCTV survey helps identify construction defects, debris, standing water, displaced joints and other issues before they delay inspection or adoption. We can survey individual phases or complete drainage networks and provide clear reporting to help project teams coordinate any required cleaning or remedial works.
S104 surveys are commonly carried out:
Before a formal adoption inspection
Once a phase of drainage is substantially complete
Following cleaning or remedial works
Before final handover
Where drainage drawings are supplied, the survey can also be reviewed against the approved layout to help identify discrepancies in routing, connections or installed assets.
S106 Sewer Connection Surveys
Section 106 relates to connecting a development into an existing public sewer.
Our S106 survey work can support projects by inspecting existing drainage, tracing sewer routes, identifying connection points and providing pre- and post-works CCTV records.
This can be particularly useful where the condition or route of the existing sewer needs to be confirmed before connection works begin.
S106 surveys can be completed as a standalone service or alongside wider S104 adoption surveying on the same development.
What do an S104 or S106 drainage survey include?
The exact survey scope will depend on the site, the drainage layout and the requirements of the project team.
A typical survey can include:
CCTV inspection of foul and surface water drainage
WRc-compliant reporting
MSCC5-coded observations
HD CCTV footage and supporting images
Identification of structural and service defects
Recording of pipe sizes, materials and connections where visible
Inspection of manholes and chambers
Comparison against supplied drainage drawings
Clear identification of sections requiring cleaning, repair or further investigation
Where required, we can also provide drainage tracing, mapping and re-surveys following remedial works.
Identify defects before they delay adoption
Newly installed drainage is not automatically defect-free.
Construction debris, silt, concrete, displaced joints, deformed pipework, poor connections and standing water are all issues that can be identified during CCTV inspection.
Finding these problems before formal inspection gives the developer or contractor time to resolve them while the site team and relevant trades are still available.
This can help reduce repeat visits, avoid unnecessary delays and give the project team a clearer route towards handover and adoption.
Re-surveys following remedial works
Where defects are identified, cleaning or remedial works can be carried out by the appointed contractor.
We can then return to site and re-survey the affected sections to confirm that the issues have been resolved.
The updated CCTV record provides clear evidence of the drainage condition following remedial works and helps identify any remaining issues before the system progresses further through the adoption process.
How does the survey process work?
1. Send us the drawings
Provide the available drainage drawings, site details and survey requirements. We review the network and agree the appropriate survey scope before attending site.
2. Onsite CCTV survey
Our engineers inspect the accessible drainage using professional CCTV survey equipment. The condition of the drainage is recorded and any defects, debris or installation issues are identified.
3. Reporting
The survey information is processed into a clear drainage report supported by CCTV footage, images and coded observations. Where drawings are available, survey findings can be referenced against the supplied drainage layout.
4. Remedial works
If issues are identified, the project team can arrange the required cleaning or repair works.
5. Reinspection
Once remedial works are complete, we can return to site to verify the affected sections and provide an updated survey record.
Why choose Clearflow Surveys?
S104 and S106 surveying is most useful when the information is clear enough for the project team to act on quickly. Clearflow Surveys combines experienced site engineers with structured reporting to provide a clear record of the drainage condition, the defects identified and the sections requiring further work.
We provide:
WRc-compliant reporting
MSCC5 coding
HD CCTV footage
Clear defect identification
Surveys against supplied drawings
Re-surveys following remedial works
Commercial and development drainage experience
Nationwide coverage
Our focus is on helping project teams identify issues early and move towards inspection, handover and adoption with fewer delays.
FAQs
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An S104 drainage survey is a CCTV inspection of newly installed drainage that is intended for adoption by a sewerage company. The survey helps identify defects, debris and installation issues that may need to be resolved before adoption.
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An S104 survey is typically carried out once the drainage network or relevant phase is substantially complete and before formal adoption inspection. It may also be carried out after remedial works or prior to final handover.
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Section 104 relates to the adoption of newly constructed sewer infrastructure, while Section 106 relates to connecting a development into an existing public sewer.
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Yes. Where approved drainage drawings are supplied, we can use them as part of the survey scope and reference findings against the available layout.
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Yes. We can re-survey affected drainage following cleaning or repairs and provide an updated record of the condition.