Split lines and stopped water
Burst Pipe Repair Denver
Split Copper & PEX Pipe Emergency Repair
A half-inch line that opens behind drywall doesn't announce itself politely. It hisses, then it soaks a ceiling. Copper tears along a seam, PEX blows a fitting, and both hand you the same first job: get the water off, fast.
- Shutoff sequence, in order
- Copper splits vs. PEX blowouts
- Containment that buys time
- Repair scope, priced honestly
What splits, where it splits, and why
Copper rarely bursts where the ice is. It bursts between the ice plug and the closed faucet downstream, because that trapped column of water has nowhere to go and pressure climbs until the weakest inch of pipe gives up. What you get is a slit, not a hole. A lengthwise tear an inch or two long, usually on a work-hardened bend or on a stretch of thin-wall Type M that somebody once ran through an exterior wall because it was the short way.
PEX behaves differently and fails differently. The tubing stretches, which is why plenty of PEX survives a night that would have opened copper. The brass fittings inside it don't stretch at all. So in the post-2000 subdivisions around Erie and Firestone, the failure is usually a crimp ring letting go at an elbow, or a split in the short stiff zone right where tubing meets fitting. It lets go with more volume than you'd guess from half-inch tubing.
Location is predictable, which is the useful part. Garage ceilings with a bedroom above them. Hose bib stubs on a sillcock nobody drained. Crawlspace runs under an addition that was framed without insulation under the floor. Attic lines over an unheated bay. If your pipe froze once, the routing is the reason it froze, and routing is its own subject in our frozen pipe guidance.
Turn things off in this order
Main valve first. A ball valve takes a quarter turn and ends up crosswise to the pipe. An old round-handle gate valve takes several full turns clockwise, and it should get stiff, then stop. Stiff and stopping is good news. Spinning freely forever means the stem has separated inside the body, and no amount of cranking will save you.
When the main won't hold, the curb stop out at the meter pit is the fallback. It usually wants a long meter key rather than a wrench, and plenty of districts would rather send someone than have a homeowner down in the pit with a screwdriver. Call the utility's after-hours line. A shutoff is generally something they'll come do.
Then bleed the system. Open the lowest fixture in the house, a laundry sink or a basement tub, plus an exterior hose bib if it isn't frozen shut, and crack something upstairs to break the vacuum. Water already standing in the vertical runs keeps pouring out of that split until you give it an easier exit. Stacks hold more than people expect.
Water near a can light, an outlet, or the panel? Breaker off before you walk into it. That one isn't a judgment call.
- If the main valve spins with no resistancethe stem is broken. Go to the curb stop or call the water utility's emergency line now.
- If the ceiling under the leak is bulgingbucket under the low point, then open a small hole on purpose. It's coming down either way.
- If a PEX fitting blewthe fix is cutting back to clean tubing and setting a fresh ring, not re-crimping the one that failed.
- If water reached insulation or carpet padpull it out today. Both hold water against framing for weeks and dry from the outside in.
Patch it, replace the run, or rethink the routing
The pipe work is the cheap part. One accessible split in copper is two cuts and a coupling, twenty minutes of actual plumbing, and along the Front Range that kind of visit commonly lands in the low hundreds. Cost climbs with access, not with difficulty. The identical repair inside a finished ceiling, behind tile, or under a slab runs into the high hundreds or the low thousands once you count opening, repairing, and closing, and drywall and paint are usually a separate trade on a separate invoice.
After-hours and holiday rates run higher, sometimes a lot higher, and a hard freeze weekend is exactly when every truck in the metro is already committed. Worth knowing while you decide whether six in the morning is soon enough. With the water off and the mess contained, sometimes it is.
Patching a split that froze because of where the pipe runs just schedules the next one. If the line crosses an exterior wall, an unheated garage bay, or a vented crawlspace, ask about rerouting that section into conditioned space while the wall is already open and the drywall bill is already spent. That version costs more once and ends the pattern. And if you're finding a second and third split in the same Type M run in a pre-1970 house in Wheat Ridge or Englewood, you've stopped having a burst pipe problem. You have a pipe problem.
Two questions set the scope. Can a plumber reach the split without cutting finished surfaces, and did the pipe fail because of a freeze that will repeat in the same spot? Easy access plus a one-off cause means a coupling and you're done by lunch. Hard access plus bad routing means fix the routing while the hole is already open.
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Start a quoteThe hours after the water stops
Dry air along this corridor is a real advantage and it does nothing for saturated material. Wet drywall wicks upward from the floor and stays wet at the bottom plate. Carpet pad behaves like a sponge with a plastic lid. Blown-in insulation in a wall cavity turns into a cold compress packed against the studs. Open it, pull it, and put moving air on it within a day or two, because after that you're not drying a house, you're negotiating with mold.
Photograph everything before you clean up. Keep the failed section of pipe in a bag. Save receipts for fans, dehumidifier rental, and the emergency visit. Carriers commonly cover sudden water damage while declining the failed part itself, and the line between sudden and gradual gets drawn using whatever you can show them.
Then do the boring follow-up that nobody does. Label the main valve with a tag. Turn it a quarter and back once a season so it doesn't seize open. And understand that a line failing under concrete looks nothing like this one, gives you almost no warning, and gets found a completely different way, which is the whole subject of our slab leak page.
Related work
More emergency services
Water Main & Service Line Repair
the buried service line from meter to house, leaks in the yard, replacement
→Slab Leak Detection
warm spots, unexplained bills, acoustic and thermal location, reroute vs. break-in
→Bathroom Leak Repair
ceiling stains below baths, shower pan failures, supply and drain leaks
→Sump Pump Repair
failed floats, discharge freeze, battery backup, spring melt loading
→Gas Line Repair
smell-gas protocol, appliance lines, sediment traps, when to evacuate first
→Where we cover
Front Range cities we write for
Questions we actually get
Burst Pipe Repair: quick answers
Can I patch a burst pipe myself until a plumber gets there?
On accessible copper, with the water off and the pipe dry, a push-to-connect repair coupling is a legitimate stopgap that a lot of plumbers use permanently. Cut out the split, deburr both ends, and set the coupling on clean pipe. What doesn't work: tape, epoxy putty over a pressurized tear, or a hose clamp on a rubber patch. Those buy minutes, not nights.
Why did my pipe burst after it thawed instead of while it was frozen?
The pipe already split while it was frozen. Ice was plugging its own hole. When the plug melts, the line repressurizes and water finds the tear it made hours earlier, which is why so many discoveries happen mid-morning as the sun hits the wall rather than at 3 a.m. If a frozen line thaws, stay in the house and watch it.
Does homeowners insurance cover a burst pipe?
Most policies treat sudden, accidental water damage as covered and exclude the failed component itself, so the ceiling gets paid for and the pipe usually doesn't. Gradual seepage you could have noticed is a common denial. Some carriers also push back when a house was left unheated during a freeze. Read your own policy, call your agent early, and document before you clean.
Water still moving? Start here.
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