Burst pipe guide · Lakeville, MN
What to Do When a Pipe Bursts
What to do when a pipe bursts comes down to five moves: stay safe, close the main, drain the lines, shut off the heater if needed and call a plumber.
Emergency? Call now, 24/7(952) 000-0000- Stay out of the waterCheck for power near the wet area.
- Close the mainThen open a low tap to drain.
- Call and documentPhotos first, then dry out.
What to do when a pipe bursts, in short
- Safety firstKeep clear of water that touches outlets, cords or the panel.
- Close the main water valveClockwise until it stops.
- Drain the linesOpen the lowest faucet and flush an upstairs toilet once.
- Switch the water heater offIt should not run empty.
- Call a plumber, then take photosDry the area while you wait.
What to do when a pipe bursts, in the order that limits damage
A burst pipe can release a bathtub of water every few minutes. The steps below put safety first, then stop the flow, then protect what you can. Do them in this order.
Check for danger
If water is near outlets, a panel, or an appliance plugged into a wet floor, stay out of the water. Do not stand in a flooded basement to reach a switch. If the area is wet and you cannot reach the panel dry, call for help before touching anything electrical.
Close the main water valve
Turn the main shutoff clockwise until it stops. A quarter-turn ball valve closes with a short swing of the handle. A round wheel valve needs several full turns. The shutoff valve guide shows both types.
Open a faucet low in the house
With the main closed, open the lowest tap, often a basement sink or a hose bib, to drain the pipes. A draining line stops pushing water out of the break.
Turn off the water heater
If the burst is on a hot line, or you will be without water for a while, switch the heater off at the control. For gas heaters set the dial to pilot or off. For electric heaters, flip the breaker. A heater with no water in the tank can be damaged by its elements.
Call a plumber
Describe what you see: which room, how much water, whether the main is closed. Then move valuables out of the wet zone while you wait.
Do not wade into standing water near power
Water and electricity together are the largest risk after a burst pipe. If the water has reached outlets, appliances or the electrical panel, leave the room and call. Shut power off at the breaker only if you can reach it without stepping through water.
Why a pipe bursts in the first place
Knowing the cause tells you where to look for more damage, and whether the failure is a one-off or a sign of a pattern.
| Cause | How it happens | Typical signs |
|---|---|---|
| Freezing | Water expands as it turns to ice and splits the pipe wall, often where it sits close to an exterior wall, garage or crawl space | Split along the length, often found at thaw |
| Corrosion | A thinned wall gives way under normal pressure | Pinholes, green or rust crust, repeat leaks; see signs of corroded pipes |
| High pressure | Pressure above what the fittings were built for strains joints | Banging, leaks at several fixtures, a regulator that has failed |
| Water hammer | A fast valve closing sends a shock wave through the line | Loud knocks, a loose pipe strap, a failed joint |
| Shifting or settling | Movement in the house or ground bends a pipe | Leak at a bend or a connection to a wall |
| Failed fitting or hose | A rubber hose or plastic nut gives out | Sudden gush from a washer or a sink supply |
In a Minnesota winter, freezing is the leading suspect. A line that was fine through a mild week can fail after one night of deep cold, especially if a heating system went down or a vent was left open. The split often sits quiet while the ice holds, then pours water out the moment things warm up. If the house goes cold while you are away, the break may be discovered when you return, sometimes days later.
Protecting the house while you wait for a plumber
Once the main is off, you have time. Use it on the things that limit the cost of water damage.
Get the water out and the air moving
Standing water soaks into baseboards, drywall and subfloor fast. Move rugs, boxes and furniture off wet carpet. Use a wet-dry vacuum or a mop and bucket to take off what you can. Open windows if the weather allows and run fans pointing across the wet area.
In winter, do not open the house wide to the cold once the pipes are drained; a thawed pipe will refreeze if the heat is off. Keep the furnace running and keep the room above freezing. A space heater is a risk near wet materials, so keep it clear of water and away from anything flammable.
- Photograph before you cleanDated pictures help if you contact your insurer.
- Lift what you canFurniture legs on blocks, boxes and books to a dry shelf.
- Check below the leakWater drips down. Look at the ceiling of the room under it.
- Mark wet drywallDraw a line at the wet edge in pencil and see whether it grows.
Know what to leave alone
Do not try to solder or patch a burst on a pressurized line. Do not hang wet drywall ceilings from pressure; a bulging ceiling full of water is heavy and can collapse. If the ceiling sags, poke a small hole at the lowest point to let the water drain into a bucket, standing off to one side.
| Leave it to the plumber | Safe for you |
|---|---|
| Cutting and replacing pipe | Closing valves |
| Soldering or pressing fittings | Draining the lines |
| Gas appliances after a flood | Turning off power if dry access |
| Opening a wall for the break | Moving belongings, drying surfaces |
Temporary fixes some homeowners use, and where they stop working
A repair clamp or a push-fit coupling can bridge a small break for a short time. They do not replace a proper repair.
| Stopgap | Works for | Limits |
|---|---|---|
| Pipe repair clamp | A pinhole or short crack on a straight section | Needs a dry, clean pipe; not a long-term repair |
| Push-fit coupling | Replacing a short cut section on copper or plastic | Requires square cuts and the right size; check the pipe type first |
| Rubber and hose clamp | Emergency wrap for a minor seep | Only while the water is off, and only for hours |
| Epoxy putty | A tiny hole on a dry pipe | Poor on pressurized or hot lines |
| Freeze the pipe or use a bucket | Holding a drip until the plumber arrives | A bucket is safe; freezing kits are for trained hands |
A stopgap buys time. It does not tell you whether the pipe around the break is sound. A split in one section of pipe can mean the next section is weak too. For a permanent fix see burst pipe repair and pipe repair, which explain how a section is cut out and replaced.
What to do when a pipe bursts after a freeze
A frozen pipe and a burst pipe are not the same thing, and the next move depends on which you have.
Frozen and still intact
If a tap gives only a trickle in a hard freeze and you see no water, the line may be frozen but not yet split. Open the tap, then warm the pipe gently with a hair dryer or warm towels. Start near the tap and work back toward the frozen spot. Never use a torch or open flame.
If you find a split, stop heating, close the main and call. For ways to avoid the problem next winter, see how to prevent frozen pipes.
| You see | Likely state | Do this |
|---|---|---|
| Trickle, no water on the floor | Frozen, not split | Open the tap, warm gently |
| No water, bulge in the pipe | Ice swelling the wall | Close the main, warm gently, call |
| Water pouring from a wall or ceiling | Split as it thawed | Main off, drain, call |
| Whole house has no water | Main or service line frozen | Call; do not heat buried line |
Burst lines inside exterior walls are a common winter case. The drywall may bulge and feel cold, then drip. If you are unsure, shut off the main and watch a ceiling or wall for a few minutes. Wetness that grows with the main closed may be a drain or a heating pipe; wetness that stops points to the supply.
Cleanup, drying and the repair that follows
The break is only the start. What happens in the next two days decides how much of the house needs to be replaced.
| Material | If wet | What usually happens |
|---|---|---|
| Carpet and pad | Dry within a day or two | Pad often removed, carpet may be saved |
| Drywall | Wet more than a day | Sections cut out and replaced |
| Insulation | Soaked | Removed; wet insulation holds moisture |
| Hardwood and laminate | Standing water | Can cup and buckle; sometimes dries, sometimes replaced |
| Cabinets | Base soaked | Toe-kicks removed to dry; swollen particle board replaced |
Mold can begin to grow in damp materials within a couple of days, so speed counts. Large losses may need a drying company with industrial fans and dehumidifiers. That is separate from the plumber who fixes the pipe.
Once the plumbing is repaired, expect the plumber to pressure-test the line before it is closed up. A slow leak that remains can undo the cleanup, so ask what test was done. If the failure came from age, the plumber may suggest more than a single patch. Several bursts on one system are a reason to read repiping a house signs and cost.
Documenting a burst pipe before you start repairs
General information only. Your policy and your insurer decide what applies to you.
Keep a simple record
Take photographs and short videos of the break, the water and the damage before you move or throw away anything. Keep the broken piece of pipe if you can. Save receipts for emergency work and drying equipment. Write down the time you found the leak and when you closed the main.
- Wide shots firstShow the whole room, then close-ups.
- Keep the failed partIt shows where and how the pipe gave way.
- Save paperInvoices, notes and names of people you spoke to.
- Read your own policyCall your insurer to ask what applies to your situation.
For a general explainer, read does insurance cover plumbing leaks and burst pipes. Nothing here predicts what any policy pays.
Signs it is time to call a plumber
Almost any burst needs one. These cases are the most urgent.
Water will not stop after you close the main
A second source or a failed main valve needs help now.
The break is inside a wall or ceiling
Opening it up takes tools and a plan.
The pipe is under the slab or in the yard
Buried lines need locating and digging.
Sewage or gas smell comes with the water
Leave the area and call from outside.
Services for a burst pipe
Pick what matches your situation.
Questions about what to do when a pipe bursts
What should I do first when a pipe bursts?
What to do when a pipe bursts in the middle of the night?
Should I turn off the water heater after a pipe bursts?
Can I use my sinks and toilets after a burst?
How long can water damage take to appear?
What affects the price of a burst pipe repair?
Is a frozen pipe the same as a burst pipe?
Do I need a plumber if the leak is small?
Who do I call about a burst pipe in the yard?
Where is my main shutoff valve?
Guides that fit with what to do when a pipe bursts
Water is running right now?
Close the main, then call. One call, no forms, and a person answers. Same-day service is available.