Sewer camera inspections, explained frame by frame.

01 /What does a sewer camera inspection actually show?

A sewer camera inspection shows the inside surface of the pipe that carries everything from your house to the municipal main. That includes the building drain under the basement floor and the lateral buried under the yard, a pipe that nobody sees during a showing, a home inspection or a renovation walkthrough. The camera records what the pipe is made of, how the joints line up, whether roots have entered, whether water pools in a sag, and whether any section is cracked, broken or collapsed.

It does not show the outside of the pipe, the soil around it or sections hidden under deep water or heavy roots. A good operator says where visibility was lost. Knowing both what the camera sees and what it cannot see is how you read a report fairly; our step-by-step inspection walkthrough covers both.

The locate matters as much as the video. When the operator stops at a defect, a sonde in the camera head is found from above and the spot is marked with an estimated depth. That mark is what turns a worrying frame into a repair a contractor can actually price. See locating and depth.

Everything starts with access. The camera needs a way in: a cleanout on the building drain, a pulled toilet or, occasionally, a roof vent. If you have never found yours, sewer cleanouts and inspection points shows where they usually hide in Canadian houses. Municipal crews use heavier crawler systems on the mains under the street, which is a different job explained in CCTV sewer inspection.

02 /When is a sewer scope worth it?

A sewer scope is worth it whenever the cost of not knowing is high. That is most often before buying a resale home, before covering the pipe with a finished basement, driveway or landscaping, after a backup, and when a line needs repeated cleaning. Age, trees and history are the three strongest signals.

If none of these fits neatly, the is a sewer scope worth it guide gives a three-question test, including the cases where a scope is genuinely optional. Once you have decided, how long a sewer scope takes helps you fit it inside a condition period or a renovation schedule, and renting a sewer camera explains what a do-it-yourself look can and cannot tell you.

Costs are covered in the sewer inspection cost guide, with planning ranges and the factors that move them. If you are in Calgary or elsewhere in Alberta, the Calgary guide covers local housing eras, climate and who to call, and the Edmonton guide does the same for the capital region.

03 /How do you read the video and the report?

Read the video by watching three references: the distance counter, the water line and the joints. The counter tells you where you are. A steady, thin stream along the bottom means good slope; water that deepens until the lens goes under means a sag. Joints should pass as thin, aligned rings; a step means an offset, a gap means separation, and strands growing from the ring mean roots.

Read the report as an index to the video. Every observation should have a distance from a stated zero point, a position around the pipe (clock position), a size and a clear description. Significant defects should be marked on the ground with an estimated depth. If the report uses codes such as RBJ or JOL, the inspection report decoder translates them; if it uses plain words, how to read sewer camera footage and the glossary cover the vocabulary.

04 /What should you do with the results?

Sort every finding into one of four paths: keep the video as a baseline, clean and monitor, repair a specific section, or replace the line. Maintenance defects such as roots, grease and scale usually go to cleaning and monitoring; structural defects such as fractures, holes, large offsets and collapse usually go to repair. Sags are judged by how deep and how long the standing water is.

It helps to see the findings as a line rather than a list. The Lateral Defect Map takes each observation's distance from the footage counter and draws the run from your access point to the main, coloured by concern, so a cluster of problems in one short stretch stands apart from a pattern repeated at every joint.

Before paying for work near the property line, confirm with your municipality who is responsible for that section. Before large repairs, get a second opinion on the video. For how to compare repair quotes, SewerQuotes.com walks through line items; for root control, SewerRoots.ca goes deep; for cleaning methods matched to your pipe, see PipeCleaning.ca.

SewerInspector.ca is part of HAUSE Sewer, an independent information and quote-request network. It is not a plumbing or inspection contractor. When you are ready, you can request an inspection quote and compare what contractors will deliver against our report checklist. The questions to ask before booking are in how to choose a sewer inspection company.

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