Burst Pipe: What to Do in the First Hour and What Repairs Cost

If a pipe bursts, shut off your main water valve right away, then turn off electricity to any wet area if you can reach the breaker without standing in water. Open the lowest faucets to drain the remaining water, photograph the damage, call a licensed plumber for the pipe and your insurer for the claim, and start removing water and drying within the first day. The Insurance Information Institute's first instruction for burst pipes is the same: turn off the water, then mop up.

Burst pipe: what to do in the first hour

Shut off the main water valve. It is usually where the water line enters the house: in a basement, crawl space, garage, utility closet, or near the water heater. In some homes it is outside near the meter. If only one fixture is affected and it has its own shutoff, closing that can buy time, but the main is the sure stop.
Make the area electrically safe. If water is near outlets, cords or appliances, the CDC says to turn off power at the main breaker, and to call an electrician if you would have to enter standing water to reach the panel. Stay out of rooms where water is touching electrical equipment.
Watch the ceiling. Water from a pipe above can collect in a ceiling and make it sag. Keep people and pets out of the room below a bulging or dripping ceiling. See our water stains on ceiling guide for what to look for afterward.
Drain the lines. Open cold faucets on the lowest level and flush toilets to relieve pressure and empty the pipes. If you shut off water to a water heater and drain the system, turn the heater off as well; manufacturers such as A.O. Smith warn never to run a heater unless it is completely full of water.
Document everything. Take photos and video of the break, the water and damaged items before you move or throw anything away. The Insurance Information Institute advises documenting damage and not discarding damaged items until the adjuster has seen them, when practical.
Protect belongings. Move furniture, rugs, electronics and papers to a dry area. Put foil or blocks under furniture legs that must stay.
Call a licensed plumber for the repair, and call your insurer to start the claim.
Start water removal. Mop, use a wet/dry vacuum, or call for burst pipe water damage cleanup if water reached walls, ceilings or more than one room.

Why speed matters

The EPA says that if wet materials are dried within 24 to 48 hours, in most cases mold will not grow. A burst water pipe can soak drywall, insulation, subfloor and carpet pad well beyond the visible puddle, and water keeps wicking into materials until it is removed. The Insurance Information Institute also notes that homeowners should take reasonable steps to prevent further damage, and that temporary repair costs should be documented with receipts.

How to tell if a pipe burst

Not every break sprays water in plain sight. A pipe inside a wall or ceiling can leak for some time before you see it. Signs include:

Sudden drop in water pressure or sputtering faucets.
Sound of running water when nothing is turned on.
Water stains, bubbling paint or sagging drywall on walls and ceilings.
Puddles near walls, cabinets or the base of stairs.
Musty smells or unexplained humidity.
A spike in your water bill.
Your water meter moving with every fixture off. The EPA suggests reading the meter before and after a two-hour period with no water use; any change suggests a leak.

During a freeze, a pipe can split while frozen and only leak once it thaws, so recheck pipes as temperatures rise. Our frozen pipes guide explains how to thaw them safely.

Why do pipes burst?

Cause	What happens	Where it is common
Freezing	Ice forms and water pressure in the trapped section rises until the pipe fails	Crawl spaces, attics, garages, exterior walls
High water pressure	Constant stress on pipes, joints and appliance hoses	Homes without a working pressure-reducing valve
Corrosion and age	Pipe walls thin over time, often at joints and fittings	Older metal plumbing
Physical damage	Nails, screws or impacts puncture a line	Walls after remodeling, crawl spaces
Ground movement	Soil shifting or settling stresses buried lines	Main water and sewer lines

Freezing. University of Illinois researchers explain that it is the water pressure that leads to a pipe's failure as ice forms along a pipe. The Insurance Institute for Business & Home Safety (IBHS) found that burst pipes are the leading cause of damage from extreme cold, especially during power outages longer than 24 hours, and that uninsulated copper is the most problematic material.

Construction and installation. The same IBHS report lists drywall fasteners driven into plumbing lines among common installation problems. These can leak slowly for a long time before showing.

Hard water. Minerals in hard water can build up inside pipes and fixtures, and IBHS notes water quality issues speed the aging of gaskets, seals and other rubber or plastic parts in appliance connections. There is no single timeline for how long hard water takes to damage pipes; it depends on water chemistry, pipe material and temperature. A plumber can inspect and test your water if you suspect a problem.

Pipe burst fix: temporary vs permanent

Temporary: Pipe repair clamps, repair tape and push-to-connect couplings can stop or slow a leak until a plumber arrives. They are a stopgap, not a fix, and only work on pipes you can reach. Keep the main off if you are unsure.
Permanent: A plumber cuts out the damaged section and replaces it, or replaces a longer run if the pipe is corroded or the break is part of a pattern. If you need to fix a broken water pipe inside a wall, expect the wall or ceiling to be opened.
Before turning water back on: Have the plumber check the rest of the line, especially after a freeze, since more than one spot may have cracked.

What repairs cost and why

Two bills usually come out of a burst pipe: the plumbing repair and the water damage. The water damage is often the larger one.

For scale, the Insurance Information Institute reports an average homeowners claim of $15,400 for water damage and freezing over 2019 to 2023. That is an industry-wide average of insured claims, not a quote for your home. What moves the cost:

Where the pipe broke: an exposed pipe in a basement costs less to reach than one inside a finished wall or ceiling.
How long water flowed before it was shut off, and how many rooms and floors it reached.
Materials affected: drywall, insulation, hardwood, cabinets and carpet each have their own repair cost. See water-damaged drywall.
Water category: clean supply water is simpler to dry than contaminated water.
Pipe material and age: an isolated repair costs less than replacing an aging section of plumbing.
After-hours timing, permits and local labor rates.

Our water damage restoration cost guide breaks down the cleanup side in more detail.

Will insurance cover a burst water pipe?

The Insurance Information Institute says homeowners and renters insurance provides coverage for burst pipes, and that standard homeowners policies cover most damage that results from a freeze. Policies will not cover damage due to lack of maintenance, the Insurance Information Institute treats seepage as a maintenance issue, and many policies limit coverage for homes left vacant. The Insurance Information Institute notes most homeowners policies have a vacancy clause that limits or excludes coverage when a home is unoccupied for typically 30 to 60 consecutive days. Coverage for the pipe repair itself can differ from coverage for the resulting water damage, so ask your insurer. Our water damage insurance claims guide covers documentation and the adjuster visit.

Pipe bursting: the other meaning

If you searched for a pipe burst machine or pipe burst sewer line replacement, that is a different subject. "Pipe bursting" is a trenchless method for replacing buried water or sewer lines: a bursting head is pulled through the old pipe, breaking it apart while a new pipe is drawn in behind it. It is a replacement technique, not an emergency, and is done by sewer and underground utility contractors.

Prevent the next one

Know your main shutoff and test it once a year.
Insulate pipes in unheated spaces and keep heat on during freezes.
Have water pressure checked if you hear banging pipes or see frequent leaks.
Replace appliance supply hoses. The Insurance Information Institute recommends replacing them all every five to seven years.
Install leak sensors or an automatic shutoff valve near water heaters, washers and under sinks.

When the damage spreads beyond a puddle, professional burst pipe water damage cleanup and drying can be worth it. You can browse help by area on our locations page.

Flood Rescue Pros is a free service that connects homeowners with independent local water damage restoration companies. If you would like to be connected with one near you, Get help now.

Frequently asked questions

What do I do if my pipe bursts?

Shut off the main water valve, cut power to wet areas if you can do it safely, drain the lines through the lowest faucets, take photos, and call a plumber and your insurer. Start removing water the same day.

Should I call a plumber or a restoration company first?

Shut off the water yourself, then call a plumber to repair the pipe. If water soaked walls, ceilings, floors or more than one room, a water damage restoration company handles extraction and drying.

Can I stay in my house with a burst pipe?

Often yes, once the water is off and the area is electrically safe. Leave if a ceiling is sagging, water reached the electrical panel, the water is contaminated, or you have no heat in freezing weather.

What does a burst pipe sound like?

You may hear hissing, spraying or running water with every fixture off, or dripping inside a wall or ceiling. Banging or clanking pipes are a separate warning sign worth having checked.

Why do pipes burst in winter?

As ice forms in a pipe, pressure in the trapped water rises until the pipe splits. Pipes in crawl spaces, attics, garages and exterior walls are most at risk, especially during long power outages.

Key facts

First move: shut off the main water valve, then make wet areas electrically safe.
Dry wet materials within 24 to 48 hours to lower the chance of mold (EPA).
Photograph damage and keep receipts for temporary repairs before cleanup (Insurance Information Institute).
Standard homeowners policies generally cover sudden burst pipes but not damage from lack of maintenance (Insurance Information Institute).
The average water damage and freezing claim was $15,400 over 2019 to 2023 (Insurance Information Institute).
Frozen pipes fail from water pressure building as ice forms; burst pipes are the leading extreme-cold loss (IBHS).

Burst Pipe: What to Do in the First Hour and What Repairs Cost