A team available 24 hours a day
A plumbing emergency doesn't schedule itself around business hours. When a pipe bursts at 2am, a drain backs up into your basement, or your water heater floods the utility room on a Sunday, you need a real plumber on the phone — not a voicemail, not an automated system. Plomberie 5 Étoiles responds to plumbing emergencies around the clock, across Montreal, Laval, the South Shore, and the North Shore.
Call Now — Don't Fill Out a Web Form in an Emergency
In an emergency, call 514-447-3700 directly. A real person answers, asks a few quick questions to assess the situation, gives you an ETA, and dispatches a plumber immediately. If you need to shut off your water right now, we'll tell you exactly how to do it while you're on the phone. Don't lose time with a web form — every minute counts when water is running.
Get a quote Click to callWhat to Do Before the Plumber Arrives
While our plumber is on the way, these steps can significantly limit the damage to your home:
1. Shut Off the Main Water Supply
This is the first action in any active leak or burst pipe situation. The main shut-off valve is typically located:
- In detached houses: In the basement, near where the water supply line enters the foundation — usually on the side of the house facing the street
- In condos: Behind an access panel in your closet, under the kitchen sink, or in a utility space — check with your condo management if you can't find it
- In duplexes and triplexes: Each unit may have its own shut-off on the riser pipe, in addition to the building's main shut-off in the basement
Turn the valve clockwise until it stops. If it's stuck or corroded, don't force it — call us and we'll walk you through alternatives while the plumber is en route.
2. Cut Electricity Near the Water
Water and electricity are a dangerous combination. If water is pooling near electrical outlets, your electrical panel, or an electric water heater, shut off the relevant circuit breaker before stepping into standing water. When in doubt, shut off the main breaker.
3. For Sewer Backup — Stop Using All Water Immediately
If your basement floor drains, laundry tub, or lower-level toilets are backing up with sewage, stop using every water fixture in the house — toilets, showers, dishwasher, washing machine. Every litre of water sent into the drain system worsens the backup.
4. Document the Damage for Insurance
Take photos and videos before cleaning anything up. Most Quebec home insurance policies cover sudden accidental water damage — but your claim will be far stronger with visual documentation of the initial state.
5. Mop Up What You Safely Can
Once the source is controlled (water shut off), mopping up standing water from a clean source — a burst supply pipe, for example — helps prevent floor and wall damage. Do not work in standing water if you're unsure of its source. Sewer backup water is contaminated and should only be handled with appropriate protection.
Get a quote Click to callEmergency Plumbing Situations We Respond To
Burst or Leaking Pipes
A leak behind a wall, in a ceiling, or along the foundation can cause thousands of dollars in damage within hours. We locate the source and repair the line the same day in most cases. For leaks with no visible source, we have smoke test detection and camera inspection equipment. See our water leak repair page.
Sewer Backup
A sewer backup into your basement, floor drains, or lower-level toilets is a sanitary emergency. Sewage water contains bacteria and pathogens — keep vulnerable people and pets away from the affected area. We respond to clear the main drain obstruction and assess the cause. See our emergency drain sewer backup page.
Flooded Basement
Whether from a sewer backup, foundation infiltration, or sump pump failure, a flooded basement requires immediate intervention to limit structural damage, mould growth, and contamination. See our flooded basement emergency page.
Failed Water Heater
An actively leaking water heater, a complete failure, or a unit creating flood risk is an emergency. We carry out same-day water heater replacements. See our hot water tank emergency page.
Completely Blocked Main Drain
When no drain in the house functions and fixtures are backing up into each other, the main drain is obstructed. The home becomes unusable until it's cleared — we respond with motorized cable or hydro-jetting depending on the cause. See our drain cleaning page.
Sump Pump Failure
During rainfall or spring snowmelt, a sump pump failure can flood a basement within hours. We replace sump pumps on an emergency basis and install battery backup systems to prevent the next failure. See our sump pump page.
Overflowing Toilet That Won't Stop
If your toilet is overflowing and the tank mechanism isn't cutting the water supply, close the shut-off valve on the wall behind the base of the toilet by turning it clockwise. Then call us. See our clogged toilet emergency page.
How Our Emergency Service Works
You call 514-447-3700. A real person picks up, 24 hours a day. No voicemail, no automated menu, no web form. We ask a few quick questions to assess the situation — and if you need to shut off the water immediately, we'll guide you through it on the call.
We confirm an ETA. Based on your location and current call volume, we give you a realistic arrival time. We don't make promises we can't keep.
The plumber arrives equipped. Our trucks carry the tools and parts needed for the vast majority of residential emergencies in a single visit — drain cables, hydro-jetting equipment, common replacement parts.
Price confirmed before we start. The plumber assesses the situation on-site and confirms the price before touching anything. No work begins without your approval.
Problem solved. We fix the issue, test the result, and confirm everything is working before leaving. We clean up our work area.
Common Emergency Plumbing Situations in Montreal, Laval, and the South Shore
Fifteen years of emergency calls across the region have given us a clear picture of what comes up most often — and why.
Cast iron pipes in pre-1975 buildings. A cast iron pipe that fails can give very little warning — a damp patch on a ceiling for weeks, then suddenly a rupture. In the duplexes and triplexes of Rosemont, the Plateau, and NDG, aging cast iron stacks are a frequent source of emergency calls.
Spring sewer backups. Snowmelt and April rain regularly overwhelm Montreal's sewer infrastructure. Homes without a backwater valve are vulnerable to backups during these periods. If you've had recurring spring backups, act before the next season — not during it.
Sump pump failures in Laval and on the South Shore. In areas of Laval (Chomedey, Fabreville) and the South Shore (La Prairie, Candiac, Châteauguay) with high seasonal water tables, a sump pump failure during a storm is an emergency measured in hours, not days. We cover the full territory.
Condos — access and coordination. In Montreal condo buildings, finding and shutting off the unit's water supply can be complicated. Call us — we'll guide you through it while the plumber is on the way. We work in Montreal condos regularly and know how to navigate access constraints and building management requirements.
Get a quote Click to callWhy Choose Plomberie 5 Étoiles for a Plumbing Emergency
A real person answers the phone. No automated menus, no voicemail, no web form. When water is running in your home, you need a human voice and an immediate answer.
15 years of emergency calls across Montreal and surrounding areas. We know the city's buildings — cast iron triplexes on the Plateau, condos in Griffintown, bungalows in Laval, 1960s-80s homes across the South Shore. We know where the shut-off valves are and how to navigate every type of building.
Trucks equipped to resolve most emergencies in one visit. No "we'll need to order the part" for common components.
Price confirmed before work begins. Always. Even in an emergency.
CAA-Québec recommended for over 10 years. Verified service quality, every year.
RBQ #5663-4538-01 · CMMTQ Member · Fully insured. All work meets Quebec building code.
4.8 stars on Google, 145+ verified reviews.
What type of Plumbing Emergencies do we service?
Below are common plumbing emergencies we handle;
- Clogged toilets
- Drain or Sewer Back up
- Burst pipes
- Water leaks
- Water heater leaks and malfunctions
- Flooded Basement
- Sump Pump Replacement
Service Areas — 24/7 Emergency Plumbing
We respond to emergencies across the entire greater Montreal area:
Montreal: All boroughs — Plateau-Mont-Royal, Rosemont, Villeray, Côte-des-Neiges, NDG, Hochelaga, Verdun, LaSalle, Saint-Laurent, Montreal North, Ahuntsic, and all others
Laval: Chomedey, Fabreville, Sainte-Rose, Vimont, Auteuil, Duvernay, Pont-Viau, and all Laval sectors
North Shore: Blainville, Boisbriand, Rosemère, Saint-Eustache, Sainte-Thérèse, Terrebonne, Mascouche, Mirabel
South Shore: Longueuil, Brossard, Boucherville, Saint-Lambert, La Prairie, Candiac, Châteauguay, Chambly, and all South Shore municipalities
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