Define the question
A survey for blockage, condition, connection or rebate evidence needs different preparation.
Visual pipe assessment
CCTV Drain and Sewer Inspection Practice Guidance
CCTV inspection is useful evidence when route, access, cleaning, image quality, position and interpretation are documented.
- Risk-firstbefore product choice
- Evidencebefore claims
- Lifecycleinspection and maintenance
Who this is for
Use the guidance within a defined role and scope.
- Drain and sewer inspectors
- Contractors and consultants
- Municipal programme staff
- Building owners
RSM scope
Independent education and standards-informed practice guidance.
External authority
Law, code, municipal rules, permits, manufacturer instructions and qualified professional decisions remain controlling.
Project responsibility
Owners, designers, contractors, inspectors and authorities retain assigned duties.
Core principles
Build practice around clear decisions and verifiable outcomes.
Reference position
Video without start point, distance and route is hard to use.
Separate observation from diagnosis
Describe visible features and confidence before cause or repair scope.
Preserve the original
Keep source video and a traceable report.
Practice detail
Preparation and access
Review drawings, cleanouts, service type, previous work and safety. Determine whether cleaning is required and whether the pipe can be inspected without damage or contamination. Record direction, entry point and flow direction.
Practice detail
Image and defect evidence
Maintain a clear lens, suitable lighting and steady progress. Record distance, orientation, branches, material changes, deposits, roots, deformation, cracks, offset joints, infiltration, water and obstructions. A camera cannot always establish grade or external soil condition.
Practice detail
Reporting and recommendations
Provide full video, summary, route sketch, limitations and still images. State whether cleaning, locating, engineering, repair or other testing is needed. Avoid assigning exact repair without sufficient evidence.
Working sequence
A repeatable pathway from question to maintained outcome
- 1
Define purpose and route.
- 2
Prepare safe access and cleaning.
- 3
Record traceable video.
- 4
Classify observations and limits.
- 5
Issue evidence and next steps.
Avoidable failures
Common ways good intentions become unreliable practice
- No distance or start point
- Highlights without source video
- Every irregularity called failure
- Camera used to claim exact grade
Related pathways
Connect guidance to the next responsible action.
Official and institutional references
Check the controlling source.
RSM summarizes concepts for education. Use current official documents, local authorities and qualified professionals for project decisions.
Frequently asked questions
Important scope and application questions
Does CCTV show outside the pipe?
No. It shows the visible interior and may suggest conditions requiring other investigation.
Should the line be cleaned first?
Sometimes. Purpose and condition determine whether cleaning is necessary and safe.
Can video confirm slope?
Standing water may be visible, but accurate grade usually requires survey or measurement.
Who owns the video?
The contract should state ownership, access, retention and reuse permission.
Standards-informed practice
Use guidance as part of a complete responsibility system.
Connect knowledge with competent roles, approvals, records, inspection, maintenance and transparent communication.
Published: July 19, 2026 Last reviewed: July 19, 2026
RSM provides independent educational and standards-informed guidance. Confirm current legal, code, municipal, professional, product and project requirements with the appropriate authority and qualified people.
Next steps
Use the standards system
Move from a single topic to the wider guidance, evidence and feedback process.