Emergency Plumbing Tips: What to Do When You Discover a Burst Pipe

A burst pipe is one of the most stressful situations a homeowner can face, and in Toronto, where winter temperatures regularly drop well below freezing, it’s a scenario we respond to constantly. The good news is that acting quickly in the first few minutes can make the difference between a manageable repair and thousands of dollars in water damage.

As a plumbing firm that has handled emergency calls across Toronto and the GTA for years, we’ve seen what happens when homeowners know what to do, and what happens when they don’t. This guide gives you the steps that matter most.

Emergency Steps: What to Do Right Now

Before you do anything else, don’t panic. It sounds obvious, but freezing up when dozens of litres of water are spreading across your floor makes everything worse. Take a breath and work through these steps in order.

1. Turn off the Stop Valve, This is the very first thing you need to do. Once you have turned the main water stop valve off, the only water that can leak out of your burst pipe is whatever already happens to be in the system. The main shutoff is usually found near your water meter or where the main line enters the basement.
2. Turn on the Cold Water Taps, Turn on all cold taps throughout the house. This draws remaining water out of the system safely, reducing how much can escape through the burst pipe.
3. Turn off Your Furnace / Boiler, Turn off any appliances you use to heat your water before touching the hot taps. With the main stop valve off, you do not want such appliances attempting to heat an empty tank.
4. Open the Hot Water Taps, Now turn on the hot taps to drain remaining water from that part of the system.
5. Turn off Your Electricity, Turn off your main electrical switch to cut off power. This is critical, if escaping water comes into contact with live electrical appliances or sockets, the risk is severe. If water is already near your electrical panel, do not enter that area.
6. Call a Plumber, Once you have taken the above precautions, contact a firm that specializes in emergency plumbing in Toronto. The sooner the pipe is repaired, the sooner you can clear up and get back to normal.

If you are unsure about any of the above steps, call an expert first. Any professional with experience in emergency plumbing can talk you through the steps before they arrive on scene.

What Damage Can a Burst Pipe Cause?

The reason speed matters is that water damage escalates fast and quietly. Here’s what we typically see when burst pipes aren’t dealt with promptly:

• Damaged walls: Water soaks through drywall quickly, creating the conditions for mold. In mild cases the drywall can be dried out; in serious cases entire sections need to be cut out and replaced, often hundreds of dollars of work beyond the pipe repair itself.
• Damaged flooring: Water travels downward. Hardwood floors can warp and discolour. Carpet that absorbs significant water into the underlay is extremely difficult to dry without removal and tends to develop persistent odour.
• Structural damage: Leaks that go undetected for hours or days can soak into structural elements, joists, subfloor, framing, making repairs significantly more expensive.
• Mould: Mould can begin developing within 24–48 hours in water-damaged areas, creating a health risk and remediation cost that goes well beyond basic plumbing work.

Document everything with photos before you start cleaning up, your insurance company will need the evidence.

How to Detect a Leak Before It Becomes a Burst

Burst pipes rarely happen without warning, the signs are just easy to miss. Here’s how to catch a developing leak before it becomes an emergency:

Check Your Water Meter

Stop using all water in your home for two hours, then check your water meter. If the reading has changed, or if there’s a small dial or indicator that’s still moving, water is escaping somewhere in the system. This is the most reliable early detection method.

Once you’ve confirmed there’s a leak, turn off the water supply at the mains and check again. If the meter stops moving, the leak is inside your home. If it keeps moving, the leak is between the meter and your house, which is a separate issue involving the water service line.

Check the Obvious Places

Look at all visible piping, under sinks, around the water heater, behind the washing machine and dishwasher, along basement walls. Check faucets and toilet supply lines. If you find no visible leak but the meter indicates one, call a plumber for a professional inspection. What you can’t see can do as much damage as what you can.

How to Prevent a Burst Pipe

Prevention is far cheaper than emergency repairs. These are the steps that matter most for Toronto homeowners:

Annual Pipe Inspection

Have a licensed plumber inspect your plumbing at least once a year. They’ll check the condition of all accessible pipe work, replace any sections showing weakness, and flag anything unusual you may have noticed. For homes over 30 years old, this is especially important, aging cast iron and galvanized pipes fail without much warning.

Insulate Exposed Pipes

Any pipes in unheated areas, basements, crawl spaces, exterior walls, are at risk of freezing in Toronto’s winters. Foam insulation or insulated tape on these pipes significantly reduces the risk. If a pipe freezes and you catch it before it bursts, apply gentle heat (a hair dryer works) and call a licensed plumber.

Before You Leave Town

If you’re heading away for more than a few days:

• For trips of two weeks or more: shut off the main water supply entirely
• For shorter trips: check washing machine, dishwasher and toilet supply lines for any leaks or soft spots before you leave
• Inspect your water heater, water heaters can fail while you’re away and cause significant flooding
• Keep the heat on, a timer for central heating, or asking a neighbour to run the heat periodically, prevents pipes from freezing while the house is empty
• Always have someone you can call to check on the house, a plumbing emergency left unattended for days is a far more expensive problem 

Consider a Water Leak Detector

Inexpensive water leak detectors placed near appliances, under sinks, and near the water heater will alert you the moment water is detected on the floor. For homes where a leak could go unnoticed for hours, particularly if you travel frequently, this is a straightforward investment.

 Need Emergency Plumbing Help in Toronto?

If you have a burst pipe or are dealing with any plumbing emergency, our emergency plumbing team is available 24/7 across Toronto and the GTA. If the pipe burst due to freezing, our frozen pipe repair specialists can handle both the immediate repair and assess the pipe condition afterward.