A burst pipe moves fast. A pinhole sprays, a split seam floods a closet, and a cracked fitting behind a wall drips quietly until the drywall sags. If you need burst pipe repair in Chesterfield, MO, the first move is the main shutoff valve, before you call anyone. Our 24/7 line dispatches for active leaks and frozen pipe breaks. Once the water is off, move belongings out of the wet zone.
Burst pipe flooding right now: the first 60 seconds
Every minute with the water running adds gallons to the floor. These steps come before the phone call, and they are listed in the order that protects the most. After that, call the 24/7 line and we will plan a same-day or after-hours visit.
- 1Shut off the main valveIt is usually near the water meter or where the line enters the house. Turn a ball valve a quarter turn, or a round gate valve clockwise until it stops.
- 2Kill power to wet areas only if it is safeIf water is near outlets, appliances or the panel, stay out. Shut off the breaker only if the panel is dry and you can reach it without stepping in water.
- 3Open a faucet at the lowest pointThis drains pressure from the line and slows the leak. Turn off the water heater too, so it does not run dry.
- 4Move electronics, rugs and papersLift what you can onto tables or into dry rooms. Water spreads along flooring faster than most people expect.
- 5Photograph everythingTake dated photos or video of the break, the water and the damage before cleanup. Your insurer will ask for them.
How a cracked or broken pipe shows itself
Not every break is a fountain. These quieter signs are often the first report we get.
A damp ceiling stain that keeps growing
A slow drip above a ceiling or inside a wall travels along framing before it shows.
A water meter that keeps moving with everything off
If every fixture is closed and the meter still turns, water is leaving somewhere underground or behind a wall.
Low pressure at every tap
A sudden drop at all fixtures can mean a split on the supply line or a failing main valve.
A warm spot on the floor
A hot-water line leaking under a slab or in a floor can heat the surface above it.
A hissing or running sound with no fixture on
Pressurized water escaping makes a steady noise in the wall or crawlspace.
If the signs are quiet and the source is hidden, pinpointing the leak comes first. Our leak detection page explains how listening gear and thermal tools find it before anything is opened.
Which pipe broke and how it is usually repaired
The fix depends on the pipe material and where it failed. Here is how common cases are handled.
| Pipe or part | Common failure | Typical repair |
|---|---|---|
| Copper supply line | Pinhole from corrosion, split from freezing, or a failed solder joint | Cut out the damaged length and sweat in a new section, or use compression or push fittings |
| PEX supply line | Split from freezing or a crimp ring that has slipped | Cut out the damaged stretch and join with new fittings |
| PVC or ABS drain pipe | Crack from impact, a loose slip joint or a hairline split | Cut out the length and glue in a new section with couplings |
| Galvanized steel supply | Pinhole leaks along a rusted pipe | Replace the section, and consider replacing more as the rest is likely to follow |
| Shutoff or stop valve | Packing leak, seized handle or cracked body | Replace the valve, then test the shutoff |
Water running and the valve is off?
Once the main is closed, the next move is a call so the pipe is cut out and replaced right.
How the repair goes after the water is off
Confirm the shutoff holds
We check that the main is truly closed and that pressure is off the line before cutting anything.
Find the extent of the damage
A split often has more cracking beyond the visible spot. We inspect both ways along the pipe and test fittings.
Open the wall or ceiling as little as needed
We aim for a clean cut that can be patched, and we tell you before we open a finished surface.
Replace the failed section
Damaged pipe is cut out and new pipe joined with approved fittings. We choose joints suited to the material.
Restore water slowly and check joints
We open the valve gradually, bleed air from the lines and watch every new joint under pressure.
Copper pipe repair and when to stop patching
Copper fails in two ways. Cold splits a pipe lengthwise, and corrosion eats pinholes through a thin wall. A single split from one freeze is a good candidate for a clean section replacement. A run covered in green spots and multiple pinholes is another story. Patching one hole often moves the pressure to the next weak point.
If you have fixed leaks in the same line more than once, a repair bill adds up quickly. That is the time to talk about repiping the affected run rather than chasing each failure. We say plainly when a patch is the right call and when it is only a delay.
Broken supply valves and drain pipe repair
The valve that fails is often the one meant to stop the flood. Old stop valves under sinks and behind toilets seize or leak at the stem, and a main shutoff that will not close is its own emergency. If the main will not turn, call us and ask Missouri American Water how to shut off at the meter.
Drain pipe repair is a different job. A cracked drain line leaks only when the fixture drains, which makes the stain appear in odd places. A cracked or broken drain pipe is cut out and replaced with new pipe. If the leak actually came from a clogged line forcing water out of a joint, drain cleaning comes first.
Frozen pipes: thaw gently, restore slowly
Missouri American Water's winter guidance is clear on the order of events. Following it protects the pipe and the house.
Shut off the main first
Do this before thawing anything. A frozen pipe may already be split, and thawing it turns a hidden crack into a spray.
Warm the air around the pipe gently
Open cabinet doors under sinks and raise the room temperature. Never use an open flame, and never leave a space heater unattended.
Open the nearest faucet
As the ice melts, water and steam need somewhere to go.
Restore water slowly
Open the main a little at a time and check every joint and the thawed length for leaks.
Call if a pipe is split or you cannot reach it
A split in a wall or crawlspace is a repair, not a thaw. Our 24/7 line takes frozen pipe breaks.
Prevention follows the same guidance. Know where the main shutoff is and test it, insulate exposed pipes in crawl spaces, garages, basements and along exterior walls, drain and turn off irrigation, and keep the thermostat at 55 or higher when you are away.
What decides the cost of a burst pipe repair
Costs vary because burst pipes vary. We quote the price before work starts, and these factors do most of the moving.
Insurance note: homeowners policies commonly cover sudden accidental water damage, including a pipe that suddenly bursts, but not wear, corrosion or long-term seepage. Read your policy, document the damage, and ask your insurer what it needs before repairs begin.
Want the real number for your job? Call the 24/7 line, describe the work, and hear a clear price before anything starts.
Know your main shutoff before the freeze
Missouri American Water supplies most of St. Louis County, and its winter guidance starts with one task: find the main shutoff and test it. The valve is usually near the meter or where the line enters the house. A valve that has never been turned may be stuck when you need it.
Check yours in the fall. If it will not close fully, call us to replace it, because a shutoff that fails during a break turns a plumbing repair into a flood. We serve neighbors in Creve Coeur and other nearby towns on the same 24/7 line.
Questions about burst pipe repair in Chesterfield
Yes. The 24/7 line dispatches for active leaks, burst pipes and frozen pipe breaks. Shut off the main first and call as soon as the water is stopped.
It is usually near the water meter or where the line enters the house. Test it once a year so it works in an emergency.
Many policies cover sudden accidental water damage but not wear, corrosion or slow leaks. Document everything and ask your insurer before repairs start.
Often yes. A single split can be cut out and replaced. If the pipe is corroded in many places, replacing the run is the better value.
Shut off the main, warm the area gently with no open flame, and restore water slowly. Call us if you see water or cannot reach the pipe.
Yes. A cracked drain is cut out and replaced with new pipe. We also check whether a clog forced water out of a joint.
Call the 24/7 line and ask Missouri American Water how to shut off at the meter. We replace failed shutoff and stop valves.
Reference points for this page: The Uniform Plumbing Code (UPC) and the International Plumbing Code (IPC) are the model codes most U.S. jurisdictions adopt, and the local permitting authority decides which edition and amendments apply. Water hardness figures come from Missouri American Water and its 2021 water quality report for the St. Louis region.