How does a camera drain inspection work?

A camera inspection allows the inside of a drain to be examined without opening a floor or excavating the property solely to search for the source of a problem. It may reveal a blockage, roots, a displaced joint, or a damaged pipe and help determine the appropriate next steps.

However, the camera does not solve the problem by itself or guarantee that excavation will be avoided. The quality of the diagnosis depends on the available access, visibility inside the pipe, the equipment used, and the interpretation of the images. Here is how a camera drain inspection works, how to prepare for it, what the equipment can actually reveal, and what costs to expect in 2026.

What is a camera drain inspection used for?

An inspection camera is attached to a flexible cable that is inserted into a pipe through a cleanout or another suitable access point. Built-in lighting records the inside of the drain and transmits the images to a monitor.

This method is primarily used to identify or confirm the cause of a problem. It may be appropriate when a drain repeatedly becomes clogged, several fixtures drain slowly, or drain clearing has not prevented the symptoms from returning. It may also be requested before purchasing a property to obtain more information about a sewer line that is difficult to assess during a general visual inspection.

However, an inspection should not be presented as mandatory in every situation. A clogged trap, venting problem, or defective plumbing fixture can sometimes be diagnosed another way. The professional should first consider the symptoms and the configuration of the plumbing system.

Signs that may justify an inspection

• Recurring blockages: the same drain begins slowing down again shortly after it has been cleared.
• Several affected fixtures: the toilet, shower, or floor drain reacts when water is used elsewhere in the building.
• Gurgling or changing water levels: these reactions may indicate a problem farther along the system without confirming its cause.
• Wastewater backing up: a sewer backup may indicate an obstruction in the main drain or another issue that requires assessment.
• Unknown history: in an older property, an inspection can document the visible condition of the pipe when the camera passes through it.

What the camera cannot always determine

The camera can only show what its lens can reach and see. A pipe filled with water, grease, or debris may conceal the walls. A complete blockage can prevent the camera head from continuing along the line. In these situations, preliminary drain clearing or cleaning may be required before usable images can be obtained.

The images do not directly reveal the condition of the soil surrounding the pipe, the foundation membrane, or sections of the system that the camera cannot reach. Standing water may suggest deformation or an improper slope, but the camera alone does not necessarily measure the slope accurately. Additional checks may therefore be required before choosing a repair.

How should you prepare for the inspection?

Proper preparation makes access easier and helps the partner understand the problem more quickly. Before the appointment, note which fixtures are affected, how often the symptoms occur, any previous work performed, and where water backs up or drains slowly.

• Locate the cleanout: it may be in the basement, near the foundation wall, in a mechanical room, or outside.
• Clear the area: remove boxes, furniture, and other objects that restrict access to the pipe.
• Report previous work: mention any drain clearing, pipe replacement, or known root problem.
• Ask whether water use must be interrupted: depending on the pipe being inspected, the partner may ask you not to use the washing machine, dishwasher, or certain fixtures during the inspection.
• Specify the result you need: a verbal diagnosis, video, photographs, surface locating, and a written report do not all serve the same purpose.

For a pre-purchase inspection, it is also useful to confirm with the seller or broker whether the cleanout is accessible. The property owner’s authorization must be obtained before any equipment is handled or work is performed in the building.

The steps in a camera drain inspection

1. Reviewing the symptoms and selecting an access point

The partner begins by gathering the available information: where drainage has slowed, how often blockages occur, which fixtures are affected, and what work has already been completed. The available access points are then examined to determine which one will allow the target pipe to be inspected in the appropriate direction.

A cleanout is generally the preferred access point. When it is unavailable or cannot be used, another opening may be considered. Removing a toilet is sometimes possible, but it adds time and requires the fixture to be reinstalled correctly. Not every access point is suitable for every camera or pipe diameter.

2. Checking the passage and visibility

Before inserting the equipment, the professional checks whether the pipe is accessible and whether the camera can advance without being forced. A completely blocked drain may first need to be opened with an auger or another drain-clearing method.

Cleaning may also be required when deposits cover the pipe walls. The objective is not to make every pipe perfectly clean, but to obtain enough visibility to distinguish a surface deposit from a structural problem.

3. Selecting and preparing the camera

The appropriate camera depends on the drain’s diameter, length, and configuration. A small camera head may be suitable for a secondary line, while a main drain may require a different camera and cable. Some equipment provides a self-levelling image, distance counter, video recording, or transmitter that can be located from the surface.

These features are not available on every camera system. If video, distance measurements, or precise locating are important for your records, specify this requirement before the appointment.

4. Advancing through the pipe and reviewing the images

The camera is gradually inserted into the drain. The partner observes the walls, connections, changes in direction, and areas where debris has accumulated. The camera must advance in a controlled manner. Forcing the head through a tight bend, collapsed pipe, or compact obstruction could cause the equipment to become stuck.

The distance displayed by some systems helps estimate the location of an issue in relation to the access point. This measurement must be interpreted carefully, particularly in a network containing several bends or changes in direction.

5. Identifying visible issues

The inspection may reveal several different conditions:

• Deposits and objects: grease, sediment, residue, or a trapped object reducing the pipe’s usable diameter.
• Tree roots: they generally enter through a joint, crack, or another existing opening.
• Displaced joint: two sections of pipe are no longer properly aligned and begin trapping debris.
• Corrosion or deterioration: the walls may become rough, thin, or difficult to assess depending on the material.
• Crack or break: a visible opening may require further investigation before the extent of the work can be determined.
• Deformation or sagging: a section may retain water or prevent the camera from continuing along the line.

A dark or irregular image does not automatically prove that a pipe is broken. The lens may be splashed, the pipe may contain water, or the camera angle may distort what is visible. The interpretation should consider the entire recording and the symptoms observed in the building.

6. Locating the camera from the surface when necessary

When the camera has a compatible transmitter, the partner can use a receiver at the surface to estimate its position and depth. This step is useful when a damaged section must be located beneath a concrete slab, driveway, or part of the property.

Locating can reduce the area requiring further investigation, but its accuracy depends on the equipment, depth, surrounding materials, and potential interference. It does not replace the checks required before excavation.

7. Explaining the results and next steps

After removing the camera, the partner explains the observations and generally distinguishes the visible problem from the solution being considered. An accumulation of debris may lead to cleaning, while a displaced or severely deteriorated section may require further assessment.

A second inspection may be performed after drain clearing or cleaning to examine walls that were previously concealed. It may also help confirm that flow has been restored, without guaranteeing that another problem will never occur.

Video, photographs, and reports: what should you receive?

Deliverables vary from one partner and assignment to another. A basic inspection may conclude with a verbal explanation of the images. Other services include a video recording, screenshots, surface locating, or a document summarizing the issues observed.

Before the appointment, ask whether the price includes:

• the complete recording or only selected footage;
• photographs of the issues;
• the distance and approximate location of the problem;
• a written report describing the findings;
• a follow-up inspection after cleaning;
• delivery of the files by email, download, or another format.

The CERIU Guide to Television Inspection of Sewer Systems discusses methods, protocols, and data-quality control in the context of sewer systems. However, a routine residential inspection is not automatically conducted according to a standardized municipal protocol and does not necessarily include this type of report.

If an insurer, municipality, buyer, or another party requires a particular format, confirm its criteria directly before ordering the service. A video can document the visible condition of the pipe, but it does not guarantee acceptance of an insurance claim or establish a party’s liability.

What costs should you expect in 2026?

There is no universal price for a camera drain inspection. The invoice may include travel, labour, equipment use, and, depending on the assignment, additional charges for cleaning, locating, or preparing a report.

As a general indication, the pricing structure commonly communicated by SOS Plombiers in 2026 for a standard residential request is:

• $145 for travel;
• $145 per hour for labour;
• $250 for use of the camera;
• taxes, materials, and additional work charged separately when applicable.

When the first three items apply and one hour of labour is charged, the indicative subtotal is $540 before tax. This is not a guaranteed package price. The applicable rates, minimum billing requirements, and additional charges must be confirmed when submitting the request.

The total may vary according to:

• access to the drain: an accessible cleanout or a fixture that must be removed;
• the condition of the pipe: a clear passage, complete obstruction, or deposits requiring cleaning;
• the length and number of pipes: one main drain or several branches to inspect;
• the requested equipment: a specialized camera, locating equipment, recording, or follow-up inspection;
• the deliverables: a verbal diagnosis, video files, or a written report;
• the timing of the service: an urgent request outside regular hours may be billed differently.

The guide to camera inspection costs explains the factors to compare in greater detail. To prevent misunderstandings, ask whether the stated amount includes travel, time on site, equipment, and delivery of the images.

How should you choose a partner for the inspection?

Equipment does not replace the experience required to interpret the images and propose work that is proportionate to the problem. When plumbing work must be performed, verify that the company is a CMMTQ member and holds the required licence subclasses. The CMMTQ also advises requesting a written estimate that specifies the prices, taxes, hourly rate, and fees associated with specialized tools or equipment.

SOS Plombiers is a referral platform. It directs requests to qualified local plumbing partners according to the service area, type of work, and availability. The availability of the requested equipment, price, and service timing must be confirmed for each request.

To have a pipe inspected, you can review the camera inspection service for drains and pipes or submit your request to SOS Plombiers.

Understand the results before choosing the work

A camera inspection is primarily a diagnostic tool. It allows the accessible condition of a pipe to be viewed, an issue to be documented, and drain clearing, cleaning, or repairs to be targeted more effectively. It can reduce exploratory work, but it does not make every diagnosis automatic or eliminate the need for other checks.

Before authorizing significant work, make sure you understand what was observed, where it was found, which parts of the system could not be inspected, and why the proposed solution corresponds to the visible problem. Distinguishing between the images, their interpretation, and the recommended work is the key to making a well-informed decision.

Frequently asked questions about camera inspections

How long does a camera drain inspection take?

There is no fixed duration. An accessible drain with a sufficiently clear passage may be inspected quickly, while difficult access, an obstruction, or several pipes requiring inspection will extend the service. Time spent cleaning, locating, or preparing a report must also be considered.

Should the camera be used before or after drain clearing?

It depends on the condition of the drain. An initial pass may sometimes locate a blockage, but a complete obstruction can prevent the camera from advancing. After drain clearing or cleaning, another pass often provides a better view of the walls and the possible cause of the problem.

Can the inspection damage an old pipe?

The method is generally minimally invasive, but equipment should never be forced through a severely deteriorated, collapsed, or obstructed pipe. The partner should select an appropriate camera and stop advancing if the passage presents a risk to the equipment or drain.

Is a video automatically accepted by an insurer?

No. A video or report may support the description of a loss, but each insurer determines the documents required and how the coverage applies. Ask the insurer what format it expects before ordering a particular report.

Can a French drain be inspected with a camera?

It is sometimes possible when a suitable access point exists and the pipe allows the equipment to pass. The camera may reveal deposits, water, or a damaged section, but it cannot assess the surrounding soil, foundation membrane, or entire perimeter drainage system by itself.

What happens if the camera can no longer advance or becomes stuck?

The partner should stop pushing the equipment and determine what is blocking its path. When a transmitter is present, the camera head may sometimes be located from the surface. The recovery method then depends on the configuration and condition of the pipe. Targeted access may be required in more complex situations.