What Is Considered a Plumbing Emergency?
Not every plumbing problem needs a middle-of-the-night call. Some do, and waiting can turn a small repair into thousands of dollars of water damage. This is a plain-language guide to what counts as a real plumbing emergency in Ontario homes, what can safely wait, and what to do in the first minutes while you wait for a plumber.
Real plumbing emergencies
Anything that is spreading water, threatening safety, or making the home unusable should be treated as an emergency and called in right away.
A pipe under pressure that is spraying or gushing water can flood a home in minutes and damage floors, ceilings and drywall. Shut off the main water valve and call right away.
Waste water coming back up through floor drains, tubs or lower-level toilets is both a health hazard and a sign of a blocked main line. Stop using water in the home and call.
A total loss of water when the municipal supply is fine usually points to a failed valve, a break, or a frozen line, and needs same-day diagnosis.
A tank that is leaking from the body, not just the T&P valve, can fail suddenly and dump 40 to 60 gallons of hot water. Shut off power/gas and the cold-water inlet and call.
If the shut-off valve behind the toilet is stuck or the water keeps rising, you need help before water reaches subfloors and ceilings below.
A frozen supply line can burst as it thaws. If you have no water at one fixture in winter and can see frost on the pipe, treat it as urgent.
Leave the building, call your gas utility first, then call a plumber. Do not use switches, phones or open flames inside.
Usually not an emergency
These problems are inconvenient, but they are usually contained and can wait for a normal service appointment. If any of them get worse, or start spreading water, treat it as an emergency.
One slow sink or tub, while the rest of the home drains normally, can usually wait until a regular appointment.
Annoying and wasteful, but not urgent. Book a standard visit.
Usually a flapper or fill-valve issue. Shut the water off at the wall if it is wasting a lot of water, then book a normal appointment.
Often an aerator or cartridge. Not an emergency unless it is happening whole-home.
Place a bucket, shut the local valve, and book a regular visit.
What to do first, before the plumber arrives
- 1Shut off the water. Use the local shut-off if the problem is at one fixture (behind toilets, under sinks, at the water heater). Use the main shut-off valve for anything larger, burst pipes, whole-home leaks, or a leaking water heater.
- 2Cut power to affected areas. If water is near outlets, appliances or a panel, turn off the breaker for that circuit.
- 3For a leaking water heater, shut off the gas valve or the electrical breaker to the heater, then the cold-water inlet on top of the tank.
- 4For a suspected gas leak, leave the building, call the gas utility from outside, then call a plumber.
- 5Move valuables and electronics out of the affected area, then call an emergency plumber.
When in doubt, call
A quick phone call costs nothing and takes a minute. Describe what you are seeing and we will tell you whether it is safe to wait, or dispatch a plumber right away.
Emergency plumbing FAQs
What time counts as after-hours for a plumbing emergency?+
Anything outside regular business hours, plus weekends and holidays, is typically treated as after-hours. A real emergency does not wait for morning, and neither should the call.
When should I call an emergency plumber vs. wait until morning?+
Call right away if water is actively spreading, you have lost all water, sewage is backing up, a water heater is leaking from the tank, or you smell gas. If the problem is contained by a shut-off valve and is not spreading, it can usually wait for a regular appointment.
Is a slow drain a plumbing emergency?+
A single slow drain is not an emergency. Multiple drains slow at once, gurgling toilets, or waste backing up into tubs or floor drains is, and points to a main-line problem.
What should I do first while I wait for the plumber?+
Shut off the water at the closest valve, cut power to the affected area if water is near outlets or appliances, move valuables out of the way, and take photos for insurance.
Do you charge more for emergency calls?+
Pricing is confirmed on the phone before dispatch. A specialist assesses the problem on-site before any repair work is priced, and pricing is explained before approved work begins.
Where do you offer emergency plumbing service?+
Mississauga, Brampton, Oakville, Milton and Georgetown, plus surrounding areas through our other locations.
Get a plumber in Mississauga on the way
Call for immediate help, or send us your details and a plumber will follow up to confirm scheduling based on urgency and availability.
- Service areaMississauga and surrounding Ontario, see our other locations for adjacent cities.
- HoursOpen 24 hours, 7 days a week