A CCTV drain survey is the only definitive way to assess the internal condition of underground drainage. We use push-rod cameras for runs up to 30m (typical residential), and self-propelled crawler cameras for runs up to 200m (commercial and large residential). Full-colour HD video is recorded throughout, with sondes and locators establishing depth and routing.
Every survey produces a WRc-coded defect list, the British Water industry standard classification used by insurers, conveyancers, building-control officers and water authorities. The report includes location-mapped defects, severity ratings (1–5), root-cause analysis and recommended remediation.
Where this service applies
- Pre-purchase drainage condition surveys
- Insurance claim investigations (escape-of-water, subsidence)
- Build-Over Agreement applications to Thames Water
- Recurring blockage diagnosis
- Conveyancing requirements (raised by buyer's solicitor)
- Section 106 / Sustainable Drainage compliance
- Post-clearance verification surveys
- Structural condition reports for trust/probate property valuations
How we deliver
No surprises, no upselling. The exact path every job follows.
- 1
Site visit & access plan
Inspection chamber identification, route mapping. - 2
Initial flush & clearance
If drains are blocked, partial clearance to allow camera access. - 3
CCTV survey
Push-rod or crawler camera through the entire drain run with full HD recording. - 4
Sonde location
Underground depth and route mapped via sonde transmitter and locator. - 5
Defect coding
All findings WRc-coded by trained surveyor. - 6
Written report & video
Full PDF report with images, video links, and remediation quotes. - 7
Optional follow-up
Repair, relining or excavation quote provided separately.