Key Takeaways
- •The first move is always to shut off the main water valve. Every minute of flow puts more water into the structure.
- •Pipes in exterior walls, attics and crawl spaces are the ones most exposed on a cold night.
- •Triage in four steps: water (shut off), electric (kill breakers in affected rooms), gas (leave and call if you smell it), then the restoration call.
- •Per the EPA, in most cases mold will not grow if wet items are dried within 24 to 48 hours. That is the clock you are working against.
- •Mr. Fresh answers 24/7 at (707) 816-7103, by call or text.
The First Five Minutes: Shut Off Water
When you find water spraying out of a wall, the instinct is to work out where it is coming from. That can wait. The first move is to stop the flow. Source diagnosis comes second.
Look for the main water shutoff in one of a few places: on the garage wall closest to the street, on the front exterior wall where the line enters, or near the water heater. Some older homes have it under the kitchen sink. Find yours now, before you need it, and label it so anyone in the house can find it in the dark.
Turn it clockwise until it stops. If the valve is stuck, which is common on a valve nobody has turned in years, a pair of channel locks usually frees it. If it still will not turn, the next stop is the shutoff at the water meter, which needs a meter key from a hardware store. If neither is reachable, call your water provider's emergency line.
Once the water is off, open the lowest faucets in the house, such as a utility sink or bathtub, to drain the lines and reduce what is still under pressure. Then begin the triage below.
The Four-Step Triage: Water, Electric, Gas, Restoration
Work through these four steps in this order. Skipping ahead is how people get hurt.
1. Water
Already covered above. Main off, low faucets opened to drain the lines.
2. Electric
If water has reached an outlet, a baseboard heater or any plugged-in appliance in an affected room, kill the breakers for those rooms at the main panel. Do not stand in water and reach for an outlet to check. If you cannot get to the panel safely, leave it and tell the professionals when they arrive.
3. Gas
If the burst was near the water heater, the furnace or anywhere with a gas line in the wall, pay attention to smell before doing anything else. A sulfur or rotten-egg smell means get everyone out of the house without touching light switches, then call PG&E or 911 from outside. Do not relight a water heater or furnace that took on water until it has been checked.
4. Restoration call
Now you call. During a cold snap plumbers are often booked up, and a restoration company can start pulling water while the pipe repair is still being scheduled. Mr. Fresh offers 24/7 emergency water extraction across Solano County and the Bay Area. Call or text (707) 816-7103.
Why You Open Every Cabinet And Closet
Two reasons. Both matter.
First, preventing the next burst. A pipe that froze once can freeze again the next night if temperatures stay low. Opening sink cabinets, vanity cabinets and any closet sharing a wall with the affected pipe lets room heat reach the lines. The same applies before a forecast freeze: open the cabinets, let exterior-wall faucets drip slowly, and keep interior doors open so heat moves through the house.
Second, finding the water. After a burst, water can travel along wall cavities and floor framing where you cannot see it from the room. The closet two rooms over might have wet carpet along the back wall and you would not notice for a week. Opening every cabinet and closet on the same wall, and checking the floor below if there is one, gives whoever does the moisture check a head start.
Where DIY Drying Falls Short On A Pipe Burst
The instinct is reasonable: pull out the shop vac, set up some box fans, crack the windows and skip the restoration bill. On a small spill caught early, that can work. On a burst that ran for a while, three things get in the way.
Volume. A household shop vac holds a few gallons and has modest suction. Professional extraction equipment has far more capacity, which matters most when water has had time to soak into the pad, drywall and subfloor.
Humidity. Box fans move air across surfaces, but the moisture they lift stays in the room until something removes it. To dry carpet and backing within 48 hours, the EPA's guidance is to remove water with a wet vacuum, pull the carpet and pad off the floor and dry them using a fan, and it adds that a dehumidifier can be used to reduce the humidity in the room (EPA Mold Course, Chapter 4).
Hidden moisture. The carpet surface can feel dry while the pad underneath is still wet, and drywall behind the baseboard can still be damp. Without a moisture meter you are guessing.
We talk through the tradeoff in more detail in our DIY vs hire a restoration company breakdown.
Mold and the 48-Hour Drying Window
Time is what turns a wet floor into a bigger job. The EPA says that in most cases mold will not grow if wet or damp items are dried within 24 to 48 hours, and its guidance for carpet is to dry the carpet and backing within 48 hours (EPA Mold Course, Chapter 4). Every hour the water sits eats into that window.
For deciding what to keep and what to let go once things have been wet, see our save vs discard decision tree.
Documenting a Frozen Pipe Claim
Whether a frozen pipe burst is covered depends on your policy and your carrier, so call your agent rather than assuming either way. What you can control is the record, and it is easiest to build in the first hour.
- Photo of the burst pipe before it is repaired
- Photos of the water and the affected areas in every room
- The plumber's invoice for the repair
- A running list of damaged belongings, with photos
- Any moisture readings or drying records from whoever dries the home
Keep copies of everything. Good records help whatever the carrier decides.
When to Call a Professional
Some bursts are small enough to handle yourself. These are the signs it has gone past that.
- Water reached more than one room or went through a floor
- The burst ran unnoticed for a while
- Water touched drywall
- Water reached a wood floor, carpet or any porous flooring
- You are not sure whether the affected area is fully dry
- You plan to file an insurance claim and want drying records
Mr. Fresh has served Solano County and the Bay Area since 2013. It is family-owned, with IICRC-certified technicians, and answers 24/7. Call or text (707) 816-7103, or start at mrfreshcarpetcare.com.
Frequently Asked Questions
What is the very first thing to do when a pipe bursts in my Bay Area home?
Shut off the main water supply. The main shutoff valve is usually where the water line enters the house: a garage wall, the front exterior wall, or the utility area near the water heater. Turn it clockwise until it stops. If you cannot find it or it will not turn, call your water provider's emergency line. Every minute water keeps flowing is more material to dry and more that may have to come out.
Bay Area homes do not deal with freezes often. Why did my pipe burst?
Pipes in exterior walls, attics and crawl spaces are the ones most exposed on a cold night, and a mild-climate home often has more of them than a house built for hard winters. When water inside a pipe freezes it expands, and the pipe can split away from the ice itself, where pressure builds between the ice and a closed faucet. Often nobody notices until the thaw, when the split starts spraying.
How much water comes out of a burst pipe?
More than people expect, because a supply line is under constant pressure and keeps flowing until someone shuts off the main. A burst that runs overnight can soak carpet, pad, drywall and subfloor across more than one room. That is why the answer is always shut off the main first, then work out where the leak is.
Can I just dry it out with fans and a shop vac?
On a small burst caught early, a wet vacuum pulls standing water and slows the damage. Fans alone move air but do not remove moisture from the room. To dry carpet and backing within 48 hours, the EPA's guidance is to remove water with a wet vacuum, pull the carpet and pad off the floor and dry them using a fan, and it adds that a dehumidifier can be used to reduce the humidity in the room (EPA Mold Course, Chapter 4). Professional equipment has far more capacity than a household shop vac, and the gap shows on anything larger than a small spill.
Will my homeowners insurance cover a frozen pipe burst?
That depends on your policy and your carrier, so call your agent before assuming either way. What you control is the record. Photograph the burst pipe before it is repaired, photograph the water in every affected room, keep the plumber's invoice, and list damaged belongings as you go. Good documentation helps whatever the carrier decides.
Why do you keep telling people to open cabinet doors?
Warm air does not reach closed cabinets where supply lines run. Opening sink cabinet doors, and any closet with a pipe in the wall, lets room heat reach the pipes and lowers the chance of a second burst. After a burst, opening every cabinet and closet next to the affected wall also lets you see moisture that would otherwise hide until a smell shows up.
Is a small burst really an emergency, or can I wait until morning?
If water reached carpet, drywall or more than one room, treat it as one. Water keeps moving into drywall, insulation and subfloor for as long as it sits. The EPA says that in most cases mold will not grow if wet or damp items are dried within 24 to 48 hours (EPA Mold Course, Chapter 4), so the clock starts when the water does. Mr. Fresh answers 24/7 at (707) 816-7103, by call or text.
Pipe Burst In Your Home Right Now?
Shut off the main, then call or text. Mr. Fresh answers 24/7 across Solano County and the Bay Area.
Call (707) 816-7103