Plumbing guide · Warwick, RI
What to Do When a Pipe Bursts
When a pipe bursts, the order you act in decides how much damage you get. This guide gives the steps, the mistakes to avoid and the signs that mean call right now.
Emergency? Call now, 24/7(401) 740-0002- Close the main valveStops the water to every pipe.
- Drain and power downOpen low taps, switch off the heater.
- Call, then dry outGet a plumber coming before you mop.
What to do when a pipe bursts, in short
- Stay safe firstKeep out of standing water near outlets, cords and the panel.
- Close the main water valveEvery second it stays open adds to the damage.
- Open taps and switch off the water heaterDrain pressure and protect the tank.
- Call a plumber right awayDescribe the location and say the main is closed.
- Photograph and start dryingPictures first, then wet vac, fans and moved belongings.
What to do when a pipe bursts: the order that limits the damage
A burst pipe can put a lot of water into a house quickly. The order of your first moves matters more than speed, so read this before you ever need it.
Get yourself safe
Stay out of standing water if lights, outlets or a panel are nearby. Water and electricity do not mix, and a flooded basement can hide a live cord.
Close the main water valve
This stops the supply to every pipe. If you do not know where it is, the guide on how to shut off main water valve shows the usual spots.
Open taps to drain the lines
Open a faucet at the lowest point and one upstairs. Pressure drops and the pipes empty, so less water reaches the break.
Switch off the heater
With no water coming in, a tank water heater or an electric element can run dry. Turn it off at the breaker or set gas to pilot.
Call a plumber
Say where the pipe is, what it is made of if you know, and whether the water is stopped. Same-day service is available and the line is open 24/7.
If you smell gas, or the water is near the electrical panel
Do not stay to mop. Leave the house, and from outside call the gas company or 911 for gas. For water around a panel, do not touch the breakers with wet hands or while standing in water. Call 911 or the electric utility, and then a plumber.
Why a pipe bursts: freezing is only one cause
Knowing the cause helps you judge how much damage to expect and where else to look.
| Cause | How it happens | Where it tends to show up |
|---|---|---|
| Freezing | Water turns to ice, expands and splits the pipe wall, usually where the ice plug blocks flow | Exterior walls, crawl spaces, garages, unheated basements |
| Thaw after freezing | A split opens and the pipe leaks only when the ice melts and pressure returns | The same cold spots, often after the weather warms |
| Corrosion and age | Metal thins from inside until a section gives way | Old steel and some older copper runs, near joints |
| High water pressure | Constant stress cracks fittings and supply lines | Appliance hoses, fixture connectors, water heater lines |
| Water hammer | A sudden valve closing sends a shock wave through the line | Near washing machines, dishwashers and quick-closing valves |
| Failed joint or fitting | A glue, solder or compression joint lets go | Behind walls, under sinks, at transitions between materials |
| Ground movement or digging | A buried line is stressed or struck | Yard water lines, around foundations |
In New England most bursts happen in the weeks of hard cold, and the damage often appears days later when the ice finally lets go. A pipe can split in a cold wall on Tuesday and flood the room on Thursday. If you had pipes freeze, assume at least one is cracked until a plumber checks. The guide on how to thaw frozen pipes explains the safe way to thaw them and what to look for after.
Signs that a pipe has burst
Some bursts are dramatic. Others start as a small sign that looks like nothing.
What a burst usually looks and sounds like
A pipe under pressure that splits will often announce itself with a hiss, a spray or a sudden rush of water you can hear through the wall. Pressure will fall across the house at the same time, and a faucet may run weakly or sputter. If the main line is the one that failed, the whole house loses pressure at once.
Slower signs include a ceiling stain that spreads in an hour, a floor that feels soft, wallpaper that sags, or a smell of damp. Water coming out of the baseboard or an outlet cover on an outside wall is a warning to leave the area alone and cut the supply fast. If the signs are slow and subtle, how to find a water leak in your house will help you trace the source.
- Hissing or rushing water in a wallPressurized water escaping.
- Sudden loss of pressureA large opening somewhere in the line.
- Water stain growing on a ceilingA supply line above is releasing water.
- Bulging or sagging drywallWater pooled behind the surface.
- Water meter spinning fastHeavy flow with everything off.
Frozen but not yet burst
A pipe that has frozen solid but not split can look normal. The tell is a tap that gives no water or only a trickle on a cold morning, along with a cold wall or a frost-covered pipe in a basement or crawl space. Do not run a torch or a heat gun on it. Open the tap, warm the room and the wall with ordinary heat, and call if the pipe does not clear.
Once the ice melts, check every joint and the length of the pipe for leaks before you leave the house. If water appears, you have a burst, and the steps at the top of this page apply.
| Tap behavior | What it suggests | Next step |
|---|---|---|
| No water at all on a freezing morning | A frozen section upstream | Open the tap, warm the area, check for split pipe |
| Weak flow from one tap only | A freeze or a clog at that branch | Warm the wall near that fixture |
| Water returns, then a stain appears | A split that thawed | Close the main and call |
| Hot works, cold does not | Frozen cold line | Thaw the cold line gently |
Limiting damage while you wait for the plumber
The pipe is only part of the job. Water left in carpets, insulation and wall cavities causes mold and warped wood if it sits.
Dry the area, in a sensible order
Once the supply is closed and the area is safe, remove standing water with a wet vac, mop or buckets. Lift rugs and move furniture to a dry room. Prop open cabinet doors under a wet sink. Run fans and, if you own one, a dehumidifier. Open windows only if the outside air is drier than the room.
Wet drywall and insulation can hold moisture for days. If the water was clean supply water and you act quickly, many materials can dry. If the water came through a ceiling for hours, or sat for more than a day or two, expect to cut out and replace some materials. Photograph everything before you move it, because those pictures are useful for any insurance claim.
Remove the water
Wet vac, mop, buckets. Work from the edges toward a drain.
Move belongings
Lift rugs, furniture legs, boxes off the floor.
Start air movement
Fans and a dehumidifier. Open cabinets and closets.
Document everything
Photos with dates before you clean or discard.
What not to do
Do not use a household vacuum on water. Do not turn the ceiling light on if water is dripping from the fixture. Do not step on a ceiling that is bulging, and do not poke it to let the water out unless you have a bucket under it and the power is off to that room. A small controlled hole can release trapped water safely, but cutting at the wrong spot can bring the whole panel down.
Avoid boiling water or heat guns to thaw a pipe that has already split. Heat applied to a cracked pipe only increases the flow once it opens. Keep children and pets out of the wet area until it is dry and you are sure no power sources are exposed.
- No regular vacuum on wet floorsShock and damage risk.
- No open flame near frozen pipeFire and scalding risk.
- No touching wet outlets or switchesCut the breaker from a dry spot.
- No walking under bulging ceilingsThey can collapse.
- No waiting for the next dayMold begins within days of a soak.
How a burst pipe is repaired, and what decides the work
A plumber looks at the failed spot first, then at the pipe on either side. What you pay for depends on those two things.
| Situation | Typical approach | What drives the work |
|---|---|---|
| A short split in an accessible copper or plastic pipe | Cut out the damaged section and join new pipe in its place | How easy the pipe is to reach and which material it is |
| A cracked fitting or valve | Replace the fitting or valve | The fitting type and whether the line must be drained |
| Several splits in one run | Replace the whole run between two access points | Length of the run and the number of walls or floors involved |
| A split inside a finished wall or ceiling | Open a small access area, repair, then patch | Size of the opening, finish work and whether detection is needed |
| A buried main or yard line | Dig and repair, or replace the damaged length | Depth, distance from the house and surface to restore |
| Widespread brittle or corroded pipe | Discuss repiping instead of repeat repairs | Size of the house and how much of the system is affected |
The page on burst pipe repair describes the service in more detail, and pipe repair covers smaller failures that have not reached the burst stage. If the damaged pipe is the line from the street, see water line repair. Ask about pricing when you call, and describe the pipe material, where it is and how long it has been leaking.
Power outages, storms and empty houses
Cold snaps and nor’easters create the conditions for bursts. Planning for them is cheaper than the cleanup.
When the power goes out in the cold
A multi-day outage in winter can drop a house below freezing, especially on windy nights. If the heat will be off for a long time, open cabinet doors under sinks on exterior walls so room air reaches the pipes, and let a thin stream of water run at a faucet on the coldest wall. Moving water is much less likely to freeze than still water.
If you leave the house during an outage, consider shutting off the main and draining the lines. A plumber can walk you through that. Remember that a sump pump or a well pump has no power during an outage, so basements can flood and wells go dry. A pump issue is a job for sump pump repair, and a house on a well can be hit hard because the pump and the pressure tank both depend on electricity.
- Open sink cabinet doorsWarm air reaches pipes on cold walls.
- Drip a faucet on the coldest wallMoving water resists freezing.
- Know your main valveYou may need it in minutes.
- Keep the heat above a safe floorA cold house freezes inside walls.
- Learn the sump pit locationA failed pump can flood a basement.
Vacant homes, seasonal houses and trips
Coastal and seasonal homes sit empty through the cold months. A burst pipe in an empty house can run for days. Before you leave, shut off the main, open a low tap to drain the lines, and set the heat at a level that keeps the walls from freezing. Ask a neighbor to check the house if the forecast is harsh.
If you do come home to a burst, treat it as an emergency, with the first steps at the top of this page. For urgent calls any hour, see emergency plumber or the 24 hour plumber page.
| Before you leave | Why it helps |
|---|---|
| Shut off the main valve | Nothing can leak if nothing is pressurized |
| Open a low tap and drain the lines | Less water left to freeze |
| Set the heat to a safe minimum | Keeps walls and pipes above freezing |
| Turn off the water heater | Prevents a dry-fire or wasted energy |
| Ask someone to look in | Early notice of a burst shortens the damage |
Insurance and paperwork after a burst pipe
This is general information, not advice about any policy.
Read your homeowners policy yourself and call your insurer soon after a burst. Ask what you need to do to protect the house, what to keep, and how photos and receipts should be sent. Keep any damaged parts a plumber removes until the insurer says you can discard them, and write down the date and time the pipe failed.
Our separate guide on insurance and plumbing leaks lists the questions worth asking. Nothing on this page says what any policy covers.
Photograph first
Water line on walls, wet items, the failed pipe.
Call your insurer
Ask about their steps and time limits.
Keep receipts
Fans, pumps, hotel nights, cleanup supplies.
Save removed parts
Do not throw out the broken pipe yet.
When a burst pipe cannot wait
If any of these apply, stop reading and call.
The main valve will not close
Do not force it. Call at once and tell the plumber what is happening.
Water is near the electric panel or outlets
Stay clear and call 911 or the electric utility, then a plumber.
A ceiling is bulging with water
Keep out from under it. It can drop without warning.
Water has been flowing for hours
Expect hidden damage. Call and ask what to dry first.
Services after a pipe bursts
Burst pipe repair
Cut out the split and restore the line.
Burst pipe repair details →Emergency plumber
Water you cannot stop? Call any hour.
Emergency plumber details →Pipe repair
Fix smaller failures before they burst.
Pipe repair details →Repiping
Replace brittle or worn supply pipe in the house.
Repiping details →Questions about what to do when a pipe bursts
What should I do first when a pipe bursts?
Close the main water valve, keep clear of standing water near any electrical source, and open a low tap to drain pressure. Then call a plumber. Once the water is off and the area is safe, take photos and start drying.
What to do when a pipe bursts and you cannot find the main valve?
Look near where the water line enters the house, by the meter or the water heater. If you cannot find it, shut off the meter valve if it is accessible and call. Describe where the water is coming from so the plumber can prepare.
Can a burst pipe be fixed the same day?
Often, yes. Same-day service is available and the line is open 24/7. The time it takes depends on how easy the pipe is to reach and what needs to be opened up to repair it.
How much does it cost to repair a burst pipe?
It depends on the pipe material, how much of it is damaged, how easy it is to reach and what has to be opened and patched. Ask about pricing when you call and describe the location of the break.
Should I turn off the electricity after a burst pipe?
Only if you can reach the panel safely without standing in water. If water is near the panel or outlets, stay away and call 911 or the electric utility. Then call a plumber.
Will frozen pipes always burst?
No. A pipe may freeze and never split. But a frozen pipe is always a risk, and a split often shows only after thawing. Check every joint and the full length once the ice melts.
Is it safe to use water after a pipe bursts?
Once the pipe is repaired and the lines are flushed, water is usually fine to use. If the break was in the main line or sat open for long, run taps until the water is clear and ask the plumber if anything else is needed.
How do I stop a leaking pipe until the plumber arrives?
Close the main, drain the lines, and catch drips in a bucket. A rubber patch and a clamp can slow a pinhole, but a split or a failed joint needs a proper repair. Do not rely on tape for more than a short wait.
What if a pipe bursts when I am away from home?
Ask a neighbor or relative to shut off the main if they can reach it, and call a plumber to meet them. Next time, shut off the main before you leave in cold weather.
Does a burst pipe mean I need to replace all my pipes?
Not necessarily. One failure from a freeze is often a single repair. Several bursts, widespread corrosion or brittle old pipe is the case for repiping. A plumber can look and explain the options.
More plumbing guides
Pipe burst? Close the main, then call.
A person answers any hour. Tell them where the water is and whether it is stopped. Same-day service is available.