Burst Pipe: The First 30 Minutes That Save Your Home

A burst supply line pushes out 4–8 gallons a minute — 250+ gallons in the first half hour. What you do in those 30 minutes determines whether this is a plumbing bill or an insurance claim.

Minute 1: kill the water

Find the main shutoff valve: usually where the supply line enters the house — front foundation wall, garage, basement, or crawlspace — or at the meter box near the street (you may need a meter key). Turn clockwise until it stops. Then open the lowest faucet in the house and a tub faucet to drain pressure out of the lines.

Do this today, before anything bursts: go find your main shutoff and make sure it actually turns. Corroded gate valves seize — discovering that mid-flood is how a repair becomes a restoration project.

Minutes 2–10: power and containment

• If water is near outlets, panels, or appliances, cut power to those circuits at the breaker — or the whole house if you can't isolate them.
• Move rugs, electronics, and furniture out of the water path.
• Push standing water toward drains; a wet/dry vac beats towels ten to one.
• Photograph and video everything before cleanup — wide shots and close-ups. This is your insurance evidence.

Minutes 10–30: make the calls

Call an emergency plumber first — expect a $150–$350 emergency call-out plus the repair: a simple burst-section replacement runs $200–$1,000, while pipes inside walls or slabs run more. If water reached drywall, flooring, or ceilings, call a water mitigation company the same hour; drying equipment placed within 24 hours is what prevents mold. Our water damage guide covers that side.

Will insurance cover it?

Usually yes for sudden and accidental bursts — the water damage, drying, and rebuild are typically covered, though the pipe repair itself often isn't. Coverage gets denied when the cause is long-term seepage or, in freeze cases, when the home was left unheated. Document the burst section before the plumber discards it.

Why pipes burst in the first place

• Freezing — uninsulated lines in attics, exterior walls, and crawlspaces
• Water hammer and pressure over 80 PSI (a $10 gauge on a hose bib tells you)
• Corroded galvanized or failing polybutylene in older homes
• Tree roots and ground shift on the service line

If your home still has galvanized or polybutylene supply lines, a planned repipe on your schedule beats an emergency on the pipe's schedule — pricing is in the plumbing cost guide.

Frequently asked questions