CCTV drain surveys are most useful when there is a decision waiting on the footage. That decision might be whether a damaged joint needs repair, where roots are entering, or why one cleaned drain keeps failing. The booking should name that question before the camera goes into the pipe.
A general video of underground pipework is hard to use later. The survey becomes much more valuable when the entry chamber, direction of travel and distance along the run are recorded as the inspection progresses.
Give the camera a specific job
There are several good reasons to survey a drain, but they do not all require the same route or report. Footage for a proposed repair must locate the visible defect. A post-cleaning check needs to show the condition of the cleaned section. A connection survey may need to follow branches that do not relate to a blockage at all.
Agree the start point and stopping point
Name the chamber or access point where filming will begin and the drain section that matters. If the camera is expected to pass a branch, bend or boundary, put that in the survey brief.
The survey company can then say whether the proposed route is accessible and whether the drain needs clearing or cleaning first. This avoids paying for footage that stops before it reaches the area in question.
Clear standing water and loose debris before filming
A camera cannot show a pipe wall through dirty water. Loose material can also cover joints or make a harmless shadow look more important than it is. Where the drain is blocked or heavily coated, clearance or cleaning may need to happen before the survey.
A clear view matters more than an early recording
The drainage company should state when water, residue or an impassable obstruction prevents inspection. It should not describe a hidden section as sound simply because the camera could not see it.
If cleaning is proposed solely to obtain a view, that work should be explained separately from the filming. You can then see what was needed to prepare the pipe and what the survey itself covers.
Keep a route log while the camera is moving
The report should let somebody return to the same point without relying on guesswork. Ask for:
- the entry chamber or access point;
- the camera direction and distance travelled;
- recognisable branches, chambers or changes in direction;
- still images tied to the written findings; and
- a note of every section that remained hidden or unreachable.
Our CCTV survey question sheet can be used to agree these details before the appointment.
Read the footage with the clearance record
For a recurring blockage, keep the survey with the record of what was removed and where resistance was found. Roots, wipes, grease and broken fragments point to different follow-up decisions. The video alone may not explain which material caused the stoppage.
Visible damage should be located before a repair is priced. Where no defect is visible, the next step may be better cleaning, a change in use or monitoring rather than structural work. See our guide to recurring drain blockages for the information from earlier visits that matters.
What you should receive after the survey
Agree the files before filming starts. The handover may include video, selected still images and written findings, but the drainage company should tell you exactly what is included in its quotation.
The written note should separate what was visible from what was suspected. It should also state the route covered and any limitation caused by access, water or debris.
CCTV records pipe condition in the section reached. It does not prove that an unseen branch is clear, and it does not make a repair part of the same job automatically.