CCTV sewer inspection means recording the inside of a sewer with a closed-circuit television camera. In practice the term usually refers to municipal and commercial surveys: a truck-based crawler camera driven through mains between manholes, sometimes paired with a lateral launch camera that travels from the main into service connections. The video is typically coded to NASSCO PACP and used to plan cleaning, lining and replacement.
- Every sewer camera is technically CCTV, but the term usually means mainline work with crawlers, trucks and coded reports.
- Crawler cameras suit larger, straighter pipes entered from manholes; push cameras suit house drains and laterals.
- Lateral launch cameras enter service connections from the main, which lets a city look at the start of your lateral without entering your house.
- A city camera crew on your street is usually doing condition assessment, pre-lining work or an investigation, not inspecting your house.
- Condo corporations and commercial owners with long private mains may need mainline-style CCTV and coded reporting.
01 /What does CCTV mean in sewer inspection?
CCTV stands for closed-circuit television: a camera sends video over a cable to a monitor and recorder that only the operator sees. Any sewer camera fits that description, including the push camera used on a house. In the industry, though, CCTV sewer inspection usually means the heavier end of the work: a truck or van carrying a cable reel, a control station and a remotely driven camera that inspects public mains and large private pipes.
| Camera type | Enters from | Typical use | Limits |
|---|---|---|---|
| Push camera | Cleanout, toilet flange or vent | House drains and laterals | Reach and bends limit long or large pipes |
| Crawler (tractor) camera | Manhole | Municipal mains and large building or site sewers | Needs manhole access and reasonably straight runs |
| Lateral launch camera | Deployed from a crawler in the main | Service connections viewed from the main side | Reach into the lateral is limited by bends and length |
| Zoom or pole camera | Held at a manhole opening | Quick screening of a pipe without entering it | Sees only as far as light and zoom allow |
| Multi-sensor crawler (laser, sonar) | Manhole | Measuring pipe shape, including below the water line | Specialist work for larger pipes |
02 /How does a municipal CCTV survey work?
A municipal CCTV survey inspects a main one manhole-to-manhole segment at a time. The crawler is lowered into one manhole, driven to the next, and every observation is coded as it is found. The results feed the municipality's asset records, which are used to rank pipes for cleaning, lining or replacement.
- Plan and notify
Segments are chosen from the asset program or a complaint. Traffic control is arranged, and residents may be notified if water use or access will be affected.
- Clean the main if needed
Mains are often jetted or vacuumed first so the camera can see the pipe wall rather than debris.
- Set up at the manhole
The crawler is lowered in; confined space rules apply to anyone who needs to enter.
- Drive and code
The operator drives downstream or upstream, stopping to code joints, defects, water levels and every service connection with its clock position and whether it appears active.
- Launch into laterals where needed
If the program includes laterals, a launch camera enters selected service connections from the main.
- Report and grade
Videos, observation lists and grades are loaded into the asset system; segments are ranked for action.
03 /Why is the city running a camera down my street?
A city camera crew on your street is usually doing one of four things: routine condition assessment, preparation for lining or replacing the main, investigation of backups or complaints, or checking new infrastructure before accepting it from a developer. It is rarely about your house specifically, but it can affect you for a few hours.
| Reason | What it means for you |
|---|---|
| Condition assessment program | Usually nothing; the video becomes part of the city's records |
| Before lining the main | You may be asked to limit water use while the liner cures and service connections are reopened |
| After backups or complaints | Results may explain a street-wide problem; report your own backup history to the municipality |
| Before paving or road reconstruction | Defects in the main or service connections may be repaired while the road is open |
| New subdivision acceptance | The city checks the developer's mains and stubs before taking them over |
Lining a main is where residents notice most. A resin-saturated liner is installed inside the main, cured, and then the openings where service laterals connect are reopened from inside with a remotely operated cutter. During that window, water from your house has nowhere to go, which is why notices ask residents to hold off on laundry and long showers.
Municipal practices differ, so if a notice arrives, follow its instructions and contact the municipality with questions. In Calgary, 311 is the entry point.
04 /What can a lateral launch camera see that a push camera can't?
A lateral launch camera sees the connection to the main and the first part of the lateral from the main side, without anyone entering the house. A push camera from the house sees the building drain and usually the whole lateral to the main. Each fills a gap the other leaves.
If a municipality tells you it found a defect at your service connection, ask for the observation, the distance from the main and, if available, the video. Then compare it with a push-camera scope from your side; the report decoder translates the codes, and who owns which part of the line is a question to settle with the municipality before paying for work.
05 /What does a CCTV inspection report look like?
A CCTV report for a main or a large private sewer is organised by segment. Each segment has a header describing where it is, and an observation table listing what was found, where and how severe it is. Summary scores let the owner rank segments against one another.
| Part | What it contains | Why it matters |
|---|---|---|
| Header | Date, location, start and end structures, direction of travel, pipe size, material and length surveyed | Ties the video to one segment and lets later surveys match it |
| Observation table | Distance, code, clock position, grade, remarks and still images for each observation | The index to the video |
| Service connections | Each tap with distance and clock position, active or not | Links laterals to the main |
| Ratings | Structural and operation-and-maintenance grades, quick ratings, overall scores | Ranks segments for action |
| Video | Continuous recording of the segment | The evidence behind every code |
Coding consistency depends on training, which is why many municipal contracts ask for NASSCO PACP-certified operators. The certification guide explains what those credentials mean.
06 /When does a property owner need mainline-style CCTV?
A property owner needs mainline-style CCTV when the private drainage system behaves like a small municipal system: long private mains, manholes, large-diameter building drains or several buildings on one site. Typical examples are townhouse complexes with private mains, bare land condominiums, apartment buildings with parkade drainage, commercial and industrial sites, and campuses.
- Condo corporations — a coded, segment-by-segment survey lets the board compare condition across years and feed the reserve fund plan. See condo and multi-unit inspections.
- Commercial purchases — due diligence on a large site may call for a mainline survey of private sewers and manholes.
- Private manholes — inspecting or entering them is confined space work for trained crews only.
- Single houses — almost never; a push camera with good locating is the right tool.
Pricing for larger jobs is usually by the half-day, day or length; see the cost guide for how multi-unit work is structured. Boards and owners can request a quote with the number of buildings, known manholes and whether coded reporting is required.
FAQQuestions people ask
Is CCTV sewer inspection the same as a sewer scope?
Technically both use closed-circuit cameras. In common usage, a sewer scope is a push-camera inspection of a house drain and lateral, while CCTV inspection refers to crawler surveys of mains and large private sewers.
Can the city's CCTV video show my lateral?
A mainline survey records the service connection where your lateral joins the main. A lateral launch camera can go further into the lateral. Neither usually sees the building drain under your house.
Can I get a copy of the city's sewer video for my street?
Some municipalities provide inspection records on request. Ask through your municipality's customer service line; in Calgary, 311.
What is a lateral launch camera?
A small camera carried by a mainline crawler that can be sent from the main into a service connection, letting crews inspect the start of a lateral without entering the building.
Why does a mainline report list taps?
Taps are service connections. Recording each one with its distance and clock position lets the owner reopen them after lining and trace problems to a particular property.
Do I need to do anything when the city CCTVs my street?
Usually not. If you receive a notice, follow it; lining work may require you to limit water use for a period.
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