What happens during a professional sewer cleaning visit

01 /How should you prepare before the sewer cleaner arrives?

Preparation shortens the visit and lowers the bill. The most useful thing you can do is stop running water, because every flush or load of laundry adds sewage that has to go somewhere, and in a blocked line that somewhere is your basement.

1. Stop water use

   Pause laundry, dishwashers and showers, and ask everyone in the house not to flush. In a multi-unit building, tell neighbours who share the line.

2. Clear a path to the cleanout

   Move storage boxes, shelving and anything within two metres of the main cleanout and the floor drain. Technicians need room for a machine roughly the size of a large suitcase.

3. Protect the route

   Put down old towels or cardboard from the door to the basement if you care about flooring; many technicians bring drop cloths, but not all.

4. Write a symptom timeline

   Note which fixtures backed up, in what order, and when the problem started. Include any previous cleanings and what the invoice said. The bathtub and two-toilet test in the main sewer line clog symptoms guide gives the technician useful detail.

5. Find past records

   Camera videos, inspection reports from purchase, and old invoices are valuable. If you know the pipe material or the location of a past repair, have it ready.

6. Keep children and pets away

   Sewage, rotating equipment and open drain lines are not safe for either.

02 /What questions will the technician ask at the door?

A good technician starts with questions, because the answers tell them where the blockage probably is and which tool to bring in first. Expect some version of these, and answer as specifically as you can. If you ran the test in main sewer line clog symptoms, say what you saw.

03 /What does the technician do to access and open the line?

Once they know the symptoms, the technician locates the best access point, protects the floor and opens the cleanout. On a full line, opening a cleanout releases sewage, so experienced technicians loosen the cap slowly with a bucket, wet vacuum or drain pan ready, and stand to the side.

If there is no usable cleanout, the next choices are pulling a toilet or working through a floor drain. Pulling a toilet means a new wax ring and a little more time. Working through a floor drain trap limits cable size and can be hard on an old cast iron trap. Either is a reasonable fallback, and a technician should tell you which they chose and why.

More on sewer gas, what the smell means and who should stay away is in is sewer backup dangerous?.

04 /How is the line cleared?

On a blocked main line, most technicians start with a cable machine fitted with a cutting head sized to the pipe, commonly a 3 or 4 inch pipe in houses. They feed cable until it meets the blockage, work through it, and keep going to the municipal connection. When the blockage breaks, the standing water drops, often with an audible rush.

If the camera later shows grease, sludge or fine roots coating the pipe, a second pass with a hydro jetter may be recommended. Jetting uses a nozzle with rear-facing jets that pull the hose forward and scour the wall on the way back. It is slower and more expensive than cabling, and it should only be used on a pipe whose condition is known. The comparison is covered in depth in our main sewer line cleaning guide, and the machines themselves in sewer cleaning equipment explained.

• Ask how far the cable or hose went. A reasonable answer is a distance, for example 22 metres or 70 feet, and whether it reached the city main.
• Ask what head or nozzle was used and why.
• Ask what came back on the cable: roots, grease, wipes, paper, or debris. Photos help.

05 /How does the technician confirm the line is really clear?

The minimum proof is a flow test: several fixtures running at once, typically a bathtub, a couple of toilet flushes and a sink, while someone watches the floor drain and the open cleanout. Water should move freely without rising at the lowest opening.

The stronger proof is a camera run. A push camera with a lighted head is fed through the cleanout to the city connection, with an on-screen footage counter. Many cameras include a sonde, a small transmitter in the head that a locator above ground can find, which lets the technician mark on your lawn where a defect sits and roughly how deep it is.

For a frame-by-frame guide to reading inspection footage and defect codes, sister site SewerInspector.ca goes further.

06 /What paperwork should you receive at the end of the visit?

The end of the visit is when you convert a service call into a maintenance record. Ask for these before the technician leaves, and store them with your house documents.

• Invoice showing the method (cable, jetting or both), access used and time on site.
• Distance reached and whether the municipal connection was reached.
• Cause of the blockage and its distance from the cleanout.
• Camera video file or link, and any still images of defects.
• Surface location marks, if a sonde was used, with an approximate depth.
• A recommendation: next cleaning date, monitoring, or repair, each tied to something visible on the video.

Once you have the video and a cause, the Sewer Maintenance Planner can suggest a cleaning and inspection interval. If you need a second quote or a follow-up visit, you can request quotes here.

07 /What should you do after the technician leaves?

Run the house normally for a day and watch the floor drain. A line that was only partially cleared tends to show symptoms again within days. Check that the cleanout cap is tight and dry, and that any toilet that was pulled is not rocking or leaking at the base.

If sewage reached the basement floor, clean and disinfect before moving things back. The first hour after a sewer backup guide covers safety and insurance documentation, and how to clean up after a sewer backup goes material by material, including when to call a restoration company.

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