Burst Pipe? What to Do in the First 24 Hours, Hour by Hour

By Blake Webb, who works with contents restoration crews in Middle Tennessee · Updated October 2026 · 7 min read

The short answer

Shut off the water at the main valve, keep away from electricity near the water, and photograph the damage before you move anything. Then call a plumber and your insurance company, get standing water out, and move belongings to a dry area. Wet materials can start growing mold within 24 to 48 hours, so drying fast matters more than anything else.

Safety first: if water is near outlets, cords or your electrical panel, don't walk through it. Turn off power at the breaker only if you can reach the panel while standing somewhere dry. Otherwise, call an electrician or your utility.

The first 24 hours

First 5 minutesShut off the water. Find the main shut-off valve, usually where the water line enters the house: in a basement, crawl space, utility room, or near the water heater. Turn it clockwise until it stops. If you can't find it, the water company can shut it off at the street.
First 15 minutesMake it safe. Deal with electricity as described above. Move kids and pets out of the wet area. Watch for sagging ceilings: a bulging ceiling can be holding a lot of water.
First 30 minutesPhotograph and video everything before you clean up: the broken pipe, the water on the floor, wet walls and ceilings, and every damaged item. These pictures are your best evidence for an insurance claim.
First hourCall a plumber to fix the pipe, and call your insurance company to start a claim. Write down the claim number and your adjuster's name.
Hours 1 to 4Get water out and things up. Mop and towel standing water, or use a wet/dry vacuum. Move furniture, electronics, rugs, boxes and papers to a dry room. Put aluminum foil or plastic blocks under furniture legs that have to stay on wet carpet.
Hours 4 to 12Start drying. Run fans and a dehumidifier, open closet and cabinet doors, and if the weather is dry, open windows. For more than a small spill, a water mitigation company with commercial dryers will dry the structure much faster.
Hours 12 to 24Decide about your belongings. If a lot of furniture, rugs and boxes got wet, or rooms need to be emptied for drying and repairs, ask your adjuster about a contents packout.

Speed matters most in the first day. Mold can start growing in wet materials within 24 to 48 hours.

Clean water or dirty water?

Restoration pros sort water damage into three categories, because it changes what can be saved:

Clean water: from a supply line, like most burst pipes. The best case, if you dry it quickly.
Gray water: from a washing machine, dishwasher or overflowing sink. It carries some contamination.
Black water: sewage, toilet backflow, or outside floodwater. It's unsanitary. Porous items it soaked, like carpet pad, mattresses and upholstery, usually can't be saved.

Clean water doesn't stay clean. After a day or two sitting in a warm house, it can start to turn into the more contaminated kinds. That's another reason to act fast.

What to move first

Electronics and anything plugged in, once it's safe to unplug.
Paper: photos, documents, books. Paper soaks up water fast. See our guide to saving wet photos and papers.
Rugs. Many dyes bleed when wet. Lift rugs off wet carpet or floors. Here's how pros decide about wet rugs.
Upholstered furniture and anything made of particleboard, which swells and falls apart when it stays wet.
Boxes in closets and basements. Wet cardboard collapses and wicks water into what's inside.

What insurance usually expects from you

Most homeowners policies expect you to take reasonable steps to stop the damage from getting worse: shutting off the water, removing standing water, and starting to dry things out. Keep receipts for anything you buy or rent, like fans, a wet/dry vacuum or a dehumidifier. These are often reimbursable as part of the claim.

A sudden pipe burst is usually covered. A slow leak that went on for weeks often isn't. See what homeowners insurance usually covers.

Mistakes to avoid

Using a regular household vacuum on water. It's an electrical hazard.
Turning the heat way up to dry things. Warmth without air movement and dehumidifying can speed up mold.
Throwing damaged items away before your adjuster sees them or you've photographed them.
Painting or covering wet drywall. Walls can look dry on the surface and still be wet inside. Pros use moisture meters to check.
Waiting to see if it dries on its own. Hidden water under floors and inside walls is how small leaks become big mold claims.

The bottom line

Water off, stay safe, photos first, then call the plumber and your insurer. Get water out, get your things up and out of the wet area, and start drying the same day. The faster everything is dry, the more of your home and belongings you'll keep.

This article is general information, not professional, legal or insurance advice. If you're unsure whether something is safe, call a professional.