--- title: 'Clogged Main Drain' url: 'https://www.drain5etoiles.com/en/main-drain-sewer-line-cleaning.php' markdown: 'https://www.drain5etoiles.com/en/main-drain-sewer-line-cleaning.md' lang: en date: '2026-08-11' description: "Main Drain Clogged: Signs That Don't Lie In brief Drain 5 Étoiles cleans and unblocks main drain and sewer lines in Montreal, Laval, the North Shore, and the South Shore. Signs of a mainline clog: multiple drains backing up simultaneously, water coming up …" --- # Clogged Main Drain 4.8/5 · 151 reviews · Available 24/7 ## Main Drain Clogged: Signs That Don't Lie **In brief** **Drain 5 Étoiles** cleans and unblocks main drain and sewer lines in Montreal, Laval, the North Shore, and the South Shore. **Signs of a mainline clog:** multiple drains backing up simultaneously, water coming up in the basement floor drain, gurgling toilets when the washing machine drains, sewer odours outside near the foundation. **Our approach:** camera inspection to locate the blockage, mechanical auger or high-pressure jetting to clear it, follow-up camera to verify the line is clean and identify any structural issues. **Why Drain 5 Étoiles:** CMMTQ-certified plumbers, recommended by CAA Quebec, transparent pricing, over 130 reviews (4.7/5). Call 514-316-1043 or request a quote online. ![main drain cleaning](https://www.drain5etoiles.com/user/pages/13.emergency-services/04.debouchage-drain-principal/main-drain-cleaning.png) Sometimes, your [sink](https://www.drain5etoiles.com/en/clogged-sinks.php), [toilet](https://www.drain5etoiles.com/en/clogged-toilet.php), and bathtub are clogged all at once. If you have more than one fixture blocked simultaneously, you may have a **clogged main drain**. Most main drain blockage signs start from the **basement drain**, such as **water backup** coming out of a **bathtub or floor drain**. These are signs that your water is not evacuating into the city lines. If other people in your area are having a sewer backup, then the cause is in the **city sewers**, and it is up to the city to take care of the issue. If the sewage backs up through a single sink, toilet, or other drains, the cause is somewhere in your main drain, and you'll need to contact us at [514-316-1043](tel:5143161043). ## What Causes a Main Drain to Clog When a **main drain clogs** in your home, it is time to contact an **emergency plumber**. Once the **main drain is blocked**, it is not going to get better without professional help. The common sign of a main drain blockage is water back up in the basement of your house, by a toilet or shower overflowing. **Drain 5 Étoiles** is here to help through the steps you should take when you suspect there is a main line blockage of your sewer. ### Foreign Objects The most common reason for main drain backing up is items being flushed down the toilet. Whether you don't realize the consequences of doing so, or you don't think it will happen to you, the truth is that **main drain backup** can happen at any time, regardless of how careful you are. Everyday objects found are: - Baby diapers - Tampons - Cat litter - Oil & Grease As with any backup issue, prevention is key. Throw these items in the trash. #### Grease Grease backups happen when the grease and fats from your cooking get rinsed down the sink. This clog typically occurs about 25 feet into your Main line, where the hot water that goes down the drains is cooled off. With no hot water to cut through the grease, it starts to harden and build up over time, and then before you know it. ##### Roots If the roots get big enough, they can get inside the pipes and form [root](https://www.drain5etoiles.com/en/drain-root-removal.php) balls that clog the lines. You can prevent this problem by planting trees away from the sewer line, but once it happens, our [drain specialists](https://www.drain5etoiles.com/en/drain-camera-inspection.php) can remove all roots within your sewer line. ###### Drain 5 Étoiles Will Handle the Problem ![Drain cleaning CAA approved Experts](https://www.drain5etoiles.com/user/images/drain-cleaning-caa-approved.png)Once our plumber knows the cause of the blockage and where it’s located, they can begin to fix it. We have specialized tools to help clear problem clogs, such as a high pressure water line jets or more industrial drain snake. When you have a clogged **main drain emergency**, no matter the time of day or night, call us at [514-316-1043](tel:514-316-1043). We are always ready to serve you and we welcome your calls. ## Main Drain and Sewer Line Cleaning - Professional Service Get a quote[514-316-1043](tel:5143161043)## Areas we Serve 📍 [Montreal and the West Island](https://www.drain5etoiles.com/en/drain-cleaning-montreal-west-island.php) [Ahuntsic-Cartierville](https://www.drain5etoiles.com/en/drain-cleaning-ahuntsic-cartierville.php) [Anjou](https://www.drain5etoiles.com/en/drain-cleaning-anjou.php) [Baie D'Urfé](https://www.drain5etoiles.com/en/drain-cleaning-baie-d-urfe.php) [Beaconsfield](https://www.drain5etoiles.com/en/drain-cleaning-beaconsfield.php) [Côte-des-Neiges](https://www.drain5etoiles.com/en/drain-cleaning-cote-des-neiges.php) [Côte-Saint-Luc](https://www.drain5etoiles.com/en/drain-cleaning-cote-saint-luc.php) [Dollard-des-Ormeaux](https://www.drain5etoiles.com/en/drain-cleaning-dollard-des-ormeaux.php) [Dorval](https://www.drain5etoiles.com/en/drain-cleaning-dorval.php) 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