Backup
Sewer backup
Avoid contact with contaminated water and describe the affected fixtures.
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Service area
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Selected municipality: None
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Municipal boundaries: Gouvernement du Québec, MRNF (CC BY 4.0).Isolate the contaminated area
Avoid all contact with backed-up water or material. Keep children and pets away and stop using fixtures that worsen the backup.
One drain or several fixtures?
State whether several drains are affected, neighbours see the same issue, and water is rising in the basement.
Private line or wider network
The plumber will determine whether the blockage appears private or network-related and explain the next checks.
Inspection, cleaning, and repair
Cleanup, line access, camera inspection, and any repair are separate parts of the work.
Should neighbours be checked?
If it can be done without entering the affected area, knowing whether neighbours have the same problem may help distinguish a private incident from a wider one.
See the emergency guide and, for the initial area, the Longueuil page.