Repair the water supply
From an exposed fitting to the main service line, the affected section needs to be identified before repairs are planned.
Saint-Léonard · Montréal borough
Plumber in Saint-Léonard for leaks, drains and plumbing work
A supply line is leaking, a drain is clogged or an electric water heater needs replacing? If you need an emergency plumber in Saint-Léonard or have work to schedule, tell us what you have noticed and what kind of building is involved. Plomberie Anjou can help identify the next step.
- 24/7 emergencies
- RBQ 5688-9025-01
- CMMTQ member
Start with what you can see
A plumber in Saint-Léonard needs to know where the water is going.
A supply leak and a sewer backup call for different checks. The first clues are where the water appears and which fixtures have changed.
- Water is escaping from a supply line.
- A valve, fitting or water heater is leaking? If an accessible shutoff turns normally, shut off the affected supply and move belongings away from the water. Request water leak repair if the source still needs to be confirmed.
- Water will not drain properly.
- One clogged sink is different from several slow fixtures at once. Stop using the affected fixtures and mention any change at a floor drain. Drain unclogging or a camera inspection depends on the symptoms and access to the line.
- Water is backing up in the basement.
- Avoid using toilets, laundry equipment and other connected fixtures until the situation is assessed. Tell us where the water returned, whether it appears to be wastewater and whether other units are affected. A sewer backup must be traced before preventive work is chosen.
Repairs, drainage, installations
Plumbing services in Saint-Léonard
Help with a specific problem or a project in a home, rental unit, condominium or business. Each service page explains the work in greater detail.
Restore proper drainage
A recurring clog, wastewater coming back up and a failed pump require different solutions.
Plan the installation
Access, affected units and the scope of work matter when organizing a repair or renovation.
Not sure which service fits? Explore all plumbing services or tell us what is happening.
Flood prevention in Saint-Léonard
After a sewer backup, check the whole basement protection system.
Saint-Léonard published a borough-specific 2026 guide to flooding and sewer backups (in French). The City also has an English guide to protecting a building during heavy rain.
Wastewater rising through a drain, surface water entering from outside and a supply pipe leak can leave water in the same room for different reasons. The assessment should follow the water's path and check the existing drainage and protective devices. A backwater valve or sump pump must suit the building's actual layout.
When the main supply is involved
Indoor shutoff or City service box: who handles it?
If the leak is near the water service line or the indoor shutoff will not close, mention this when you call. A plumber can assess the accessible section and identify whether the work also requires the City to shut off the exterior service.
- Locate it without forcing it.
Note where the indoor valve is, whether it turns normally and whether water appears to escape before or after it. Do not attempt to repair a valve under pressure.
- Arrange the exterior shutoff if needed.
Montréal explains that shutting off, turning on or locating the exterior water service box involves the borough. The building owner or a representative can contact 311.
- Prepare building access.
In a multi-unit property, identify the unit, who can open the mechanical room and any other affected areas. For scheduled work, coordinate access and the water interruption with the occupants concerned.
Your exact address matters
In Saint-Léonard or just beyond the borough line?
Saint-Léonard is a Montréal borough. If your address falls in a neighbouring area, name the correct borough so the municipal steps and the service visit can be organized properly.
Customer reviews
Read reviews published for Plomberie Anjou.
The widgets below show customer experiences with the business. They do not establish that work took place in Saint-Léonard or promise a diagnosis, availability or arrival time for a new request.
Common questions
Before requesting a plumber in Saint-Léonard
A few details help us choose the right checks and prepare access.
Water may be coming from another unit. What should I tell you?
Tell us which floor and room first showed water, when the mark started changing and who can provide access to the units involved. A stain does not always sit directly below the leak, so the source should be confirmed before opening a surface.
A drain keeps clogging. Do I automatically need a camera inspection?
No. The location and frequency of the clog, along with the number of affected fixtures, guide the initial cleaning. A camera inspection can help when an accessible line needs to be viewed to understand a recurring problem or plan a repair.
Is a backwater valve enough after a sewer backup?
Protection depends on fixtures below street level and the building's layout. The City also discusses catch basins and valve maintenance. A plumber should check what is already installed, whether it remains accessible and which work is appropriate for the property.
Do you handle scheduled work in a business or multi-unit building?
Yes. Requests may involve a repair, a fixture replacement or a residential or commercial plumbing project. Tell us the building type, access hours and whether a water shutoff would affect other occupants so the scope can be planned.
Plomberie Anjou · Saint-Léonard
Tell us what you noticed. We will help plan the next step.
Active leak, clogged drain, sewer backup, water heater or planned plumbing work: provide the address, building type and access details. Call directly for an urgent situation.