Burst Pipe Emergency Guide — Calgary Homeowners

First 60 Minutes: What to Do Right Now

A burst pipe can release hundreds of litres of water in minutes. Acting quickly in the first hour limits water damage, reduces repair costs, and protects your home's structure and contents.

Shut off the main water supply

Locate your main shutoff valve and turn it off immediately. In most Calgary homes, the main shutoff is near the water meter — typically in the utility room, basement, or mechanical room. Turn the valve clockwise (right) to close it. If you have a ball valve, turn it 90° so the handle is perpendicular to the pipe.

Turn off the water heater

With the main supply off, turn your water heater to the "pilot" or "vacation" setting, or shut it off entirely. Running a water heater without a water supply can damage the tank or heating element.

Open cold taps to drain remaining pressure

Open cold water taps throughout the house to drain any remaining water from the pipes. This reduces pressure on the burst section and limits further leaking.

Turn off electricity in affected areas

If water is near electrical outlets, panels, or appliances, turn off the circuit breakers for those areas at your electrical panel. Water and electricity are a serious safety hazard. If you are unsure, shut off the main breaker.

Document the damage

Take photos and video of the burst pipe, the water damage, and any affected belongings before cleanup begins. This documentation is essential for your home insurance claim.

Call an emergency plumber

Once the water is off and the area is safe, call a licensed Calgary plumber. Burst pipes require professional repair — a temporary patch is not a permanent fix and may not meet Alberta building code.

Contact your home insurance provider

Most standard home insurance policies in Alberta cover sudden and accidental water damage from burst pipes. Call your insurer as soon as possible — many have 24-hour claims lines. Do not begin major cleanup or repairs until you have spoken with your adjuster.

How to Find Your Main Water Shutoff in a Calgary Home

Knowing where your main shutoff is before an emergency happens is one of the most important things a Calgary homeowner can do. Here's where to look:

Utility or mechanical room

Most common location in Calgary homes — look near the furnace or water heater.

Basement near the front wall

In older Calgary homes, the shutoff is often on the wall closest to the street, where the water main enters the house.

Under the kitchen sink

Some homes have a secondary shutoff here, but this only controls the kitchen supply — not the whole house.

Crawl space

In homes without a full basement, the shutoff may be in the crawl space near the foundation.

Curb stop (street shutoff)

If you cannot find or operate the interior shutoff, the City of Calgary can shut off water at the curb stop. Call 311 for non-emergency water shutoffs.

Tip: Walk through your home now and locate your main shutoff valve. Label it clearly and make sure every adult in your household knows where it is and how to operate it.

Why Pipes Burst in Calgary

Calgary's climate creates specific risks for residential plumbing. Understanding the causes helps you prevent future incidents.

Freezing temperatures

Calgary regularly experiences temperatures below -20°C. Pipes in unheated spaces — garages, crawl spaces, exterior walls, and uninsulated areas — are vulnerable to freezing. When water freezes, it expands and can split the pipe. This is the most common cause of burst pipes in Calgary.

Chinook freeze-thaw cycles

Calgary's rapid temperature swings — from -20°C to +10°C in a single day — cause repeated expansion and contraction in pipes. Over time, this stress can weaken joints and fittings, leading to failures even in pipes that have never fully frozen.

Corrosion and age

Older Calgary homes may have galvanized steel or copper pipes that have corroded over decades. Corrosion weakens pipe walls and can cause sudden failures, particularly at joints and elbows.

Water pressure surges

High water pressure (above 80 psi) stresses pipes and fittings. A pressure reducing valve (PRV) can protect your plumbing system. If you experience frequent leaks or hear banging pipes (water hammer), have your pressure checked.

Physical damage

Renovation work, driving nails or screws into walls, or accidental impact can damage pipes. Damage may not cause an immediate burst but can weaken the pipe and lead to a failure later.

How to Prevent Burst Pipes in Calgary

Insulate pipes in unheated spaces

Foam pipe insulation is inexpensive and easy to install. Focus on pipes in garages, crawl spaces, and exterior walls.

Keep your home heated when away

Never let your home drop below 13°C, even when you're on vacation. Ask a trusted neighbour to check on the property during cold snaps.

Let taps drip during extreme cold

A slow drip keeps water moving through vulnerable pipes and reduces the risk of freezing. Focus on pipes along exterior walls.

Know where your shutoff is

As noted above — locate it now, label it, and make sure your household knows how to use it.

Have your plumbing inspected before winter

A licensed Calgary plumber can identify vulnerable pipes, check your water pressure, and inspect shutoff valves before the cold season.

Install a water leak detector

Smart leak detectors can alert you to moisture before a small drip becomes a flood. Place them near water heaters, under sinks, and in utility rooms.

Disconnect garden hoses before freeze-up

A connected hose traps water in the outdoor faucet and the pipe behind it. Disconnect hoses and shut off exterior faucet valves before the first freeze.

When to Call a Professional Plumber

A burst pipe is always a job for a licensed plumber. Do not attempt to permanently repair a burst pipe yourself — improper repairs can fail, void your insurance, or violate Alberta building code.

Call a plumber immediately if:

Water is actively flowing from a pipe
You can hear water running with all taps off
There is visible water damage to walls, ceilings, or floors
You cannot locate or operate the main shutoff
The burst pipe is near electrical wiring or panels
You suspect a frozen pipe (even if it hasn't burst yet)
Water pressure has suddenly dropped throughout the house

For guidance on whether your situation qualifies as a true plumbing emergency — and how to avoid paying after-hours rates unnecessarily — see our guide on emergency vs non-emergency plumbing in Calgary.

What Does Burst Pipe Repair Cost in Calgary?

Burst pipe repair costs vary widely depending on where the pipe is located, how accessible it is, and the extent of the damage. A burst pipe in an accessible utility room is far less expensive to repair than one inside a finished wall or under a concrete slab.

Accessible pipe repair (utility room, crawl space)$300 – $800

Pipe inside a finished wall (drywall removal required)$600 – $2,000+

Pipe under concrete slab$2,000 – $6,000+

Water damage remediation (separate from plumbing)$1,500 – $15,000+

Estimates only. For a full breakdown of plumbing costs in Calgary, see our plumber cost guide.

Burst Pipe Emergency Guide for Calgary Homeowners