Burst and Frozen Pipe Repair in Las Vegas

Does It Actually Get Cold Enough in Las Vegas to Freeze a Pipe?

Yes, most winters, and that surprises people who moved here from somewhere colder. Las Vegas has recorded an average of 24 days a year with lows at or below 32 degrees over the 30-year record, per the National Weather Service climate summary for the airport station. The average December low is about 39 degrees and the average January low is about 40, so freezing is not the normal condition. It is the exception, which is exactly the problem, because a home that is fine 340 days a year is the same home that has an unprotected hose bibb on the one night it hits 24.

The median first freeze lands around December 10, and the first hard freeze, meaning 28 degrees or lower, comes around December 25. Those are medians, not promises. The first freeze has arrived as early as late November and as late as the end of December, and a hard freeze has landed anywhere from early December into late January. That spread is why the calendar is a bad planning tool and the forecast is a good one.

The pipes that fail here are rarely the ones buried in conditioned space. They are the ones in the garage wall, the exterior wall behind a kitchen cabinet, the hose bibb on the north side of the house, the line feeding a swamp cooler that nobody drained, and the irrigation stub in an unheated valve box. Anywhere the pipe is exposed to outside air with no warm room on the other side is a candidate.

Why a Pipe Bursts When It Freezes

The burst is not caused by ice expanding where the ice is. Water expands as it freezes, and that expansion pushes water further down the line against whatever is closed at the other end. The pressure builds in that trapped pocket, and the pipe fails at its weakest point, which is often a joint, a fitting, or a section already thinned by corrosion.

That is why the split is so often not where the ice was. People look at the frozen section, thaw it, and find water coming out somewhere else entirely. It also explains a pattern worth knowing: a pipe can freeze, thaw, and show no sign of trouble at all, then let go weeks later at a weakened joint the first time the pressure comes back up.

Hard water plays into it. Las Vegas water runs roughly 16 grains per gallon, about 280 parts per million, per the Las Vegas Valley Water District. That leaves scale inside the pipe, which narrows the flow and gives ice an easier place to start. Old galvanized lines corrode from the inside as well, so the pipe that looks fine from the outside has less wall on the inside than it should.

One more thing that catches people: it does not have to be freezing outside for a pipe to freeze. A line in an uninsulated exterior wall or an unheated garage can freeze on a night that stays a few degrees above 32, because the air in that cavity is colder than the air at the weather station. If the forecast is close to freezing and that cabinet under the kitchen sink backs up to outside brick, it is worth opening the doors.

The Signs of a Frozen Pipe, Before It Breaks

The reliable sign is a faucet that gives you nothing, or barely a trickle, when it has been fine all day. Open the cold tap, then the hot. If one side runs and the other does not, you have a frozen line somewhere on that side, and the ice is between the open tap and wherever the line branches. If nothing runs anywhere in the house, the freeze is likely on the service line coming in, which is a different and more urgent situation.

Frost on the outside of the pipe is the other common tell, visible on any line you can actually see, which means garage walls, crawlspaces, and under sinks. A pipe that is bulging or has visible frost along a seam is the one to be careful with, because it may be holding pressure and close to letting go.

What you will not get is much warning on the burst itself. A split line announces itself as water where water should not be: a stain spreading on a ceiling, a wall that feels soft, water pooling at the base of a cabinet, or the sound of running water inside a wall with nothing on. If you hear that, skip the thawing question and shut the water off.

Where the Shutoff Is, and How to Confirm You Got the Right One

The whole-house shutoff is usually near where the service line enters the house, which in this valley means the garage wall, a utility closet, or an outside box at the front of the property. It is often right next to the water heater or next to the hose bibb on the front wall. If you have never found it, tonight is not the night to learn, but if you are reading this after a freeze, it is still the first thing to do.

A ball valve closes with a quarter turn of the handle, so the handle crossing the pipe means shut and running with the pipe means open. A gate valve has a round handle you turn clockwise until it stops, and those get stiff with age and mineral scale, so they sometimes need a slow, steady turn rather than force. Close it all the way, then open a faucet somewhere in the house and confirm the water actually stops. If water keeps coming, the valve is not fully closed or it has failed, and that is worth knowing now.

For the record on who owns what, the Las Vegas Valley Water District owns the meter, the meter box, and the service connection up to the meter. Everything on your side of it, meaning that whole run from the meter to the house, is the property owner's pipe to maintain. That matters when the freeze happened outdoors in the yard rather than inside, because it is your line to repair. The District also runs a leak repair reimbursement program for qualifying single-family owners, which is worth looking into before you assume the whole bill is yours.

One caution that is easy to skip: if water has reached any electrical outlet, switch, or panel, do not go near it. Shut the power at the breaker from a dry spot and call for help rather than wading in.

How to Thaw a Frozen Line Without Making It Worse

Shut the water off first, then thaw. That order is not a formality. If the pipe has already split and you thaw it with the supply on, you get a live leak inside a wall the moment the ice lets go. With the main closed, the worst case is the water already sitting in the line.

Open the affected faucet before you start, both handles if the line feeds a mixer. That relieves the trapped pressure and gives the meltwater somewhere to go, and it also becomes your progress gauge. When the tap starts to drip, you are winning.

Apply heat to the air around the pipe rather than to the pipe itself. A hair dryer, a heating pad wrapped around the section, or towels soaked in hot water all work. A space heater is fine in an open space if it has nothing flammable near it and you do not walk away from it. What nobody should do is use a blowtorch, a propane torch, or any open flame, because water trapped in a closed section can flash to steam and split the pipe, and a flame in a wall cavity is a fire.

Start at the end nearest the faucet and work back toward where you think the ice is. Keep going until full pressure returns, not just until you see a trickle, because stopping early leaves ice in the line and the pressure still trapped behind it. When it does run clear, leave the tap open a few minutes and then look the whole run over for drips and cracks before you turn the main back on. If you cannot find the frozen section, cannot reach it, or have tried and the water still will not come, that is the point to call rather than keep going.

What to Do Right Now If the Pipe Has Already Burst

Close the main shutoff. This is the entire first priority, and it is worth saying plainly because people often start with towels and buckets before they stop the source. With the supply off, the water already in the walls is all you are dealing with. With it on, a split supply line can move a surprising volume into a ceiling in a very short window.

Then drain what is left by opening the lowest faucet in the house and a higher one, which lets air in and water out. Move furniture, rugs, and anything with a cord out of the wet area, and get towels or a wet vacuum on the standing water so it does not soak into flooring it cannot come back from. If the water reached the ceiling drywall, a bucket under the sag is better than letting it collapse onto the floor.

Document the damage as you go, with photos and a short list of what got wet. If you plan to file a claim, this is the part your insurance company will want, and it is much easier to capture now than to reconstruct later. One thing worth knowing when you do file: policies generally cover sudden accidental water damage, and an insurer may look closely at whether the pipe was reasonably protected from freezing. Nobody can promise you coverage except your carrier, so read your own policy or call your agent.

Then call. A burst line inside a wall needs the wall opened enough to repair it properly, and that is a licensed job. Call (702) 840-5037 and we will talk you through shutting down while a truck heads your way.

What We Do When We Get There

The first pass is finding the actual failure rather than the frozen spot. On a burst line the water usually leads you to it, but where the ceiling is stained and where the pipe split are not always the same place, because water travels along framing and pipe runs before it comes through. We look at the staining, follow the wet path, and open the smallest area that lets us see the pipe rather than cutting where the water happened to land.

On a frozen line that has not burst, the job is different and usually faster. We thaw safely, check the pipe for a split or a ballooned section, pressure test it, and tell you honestly whether it needs a repair or whether you got lucky. A line that froze without failing still has a story to tell about how exposed it is, and that is the conversation worth having while we are standing there: the same pipe will freeze again next year unless something about it changes.

The repair itself depends on what material is in the wall and how much room there is. A short split in copper gets cut out and replaced with a coupling at each end. A poly or PEX line gets a new section and the right fittings for that material. If the split is in a wall with no access, we open what we need, repair, and you get the wall closed by someone who does drywall or by us, depending on scope. You will know which before we start.

If the freeze was on the service line out in the yard, that is a different repair with digging involved, and it is worth knowing that much of this valley sits on caliche, which is slow to dig and slow to drill. Those jobs are planned, priced, and scheduled rather than done at midnight, and we will tell you which half of that line you are in.

How to Keep It From Happening Again Next Winter

The cheap fixes are the ones worth doing this week. Disconnect every garden hose from every bibb, because a hose left connected traps water in the bibb and the fitting behind it, and that is the single most common freeze failure here. If you have shutoff valves for the outdoor bibbs, close them and open the outside faucet to drain what is left. Wrap an insulated cover over any exposed bibb.

Find the pipes that sit in exterior walls and put heat where it matters. Opening the cabinet doors under a kitchen or bathroom sink on an exterior wall lets room air reach the pipe. On the coldest nights, a slow drip on the furthest fixture from the main keeps water moving, which is the same reason running water resists freezing. Both of those are temporary measures, and both work.

The real fix is insulation and air sealing. Caulk or foam around where the service line comes through the foundation, because a draft on an uninsulated pipe is what freezes it. Close foundation vents for the winter and reopen them in spring. Insulate the run through an unheated garage or crawlspace. If the irrigation system has a backflow assembly, that is worth protecting specifically, since the assembly sits above ground and holds water in a body that will split; our backflow testing page covers what that device does and why it fails.

Older homes deserve a harder look. If the plumbing is galvanized and the pressure has been dropping, or you have had more than one leak in a few years, the freeze is a symptom rather than the whole problem. The signs you need a repipe piece walks through what a system that is finished looks like, and a whole home plumbing inspection before winter is a reasonable way to find the exposed runs you cannot see from the kitchen.

Burst and Frozen Pipes Across the Las Vegas Valley

We work valley-wide and the call does not change by neighborhood. Trucks run from our offices on the north and west sides and from the Henderson side, so a call from Centennial, Summerlin, Green Valley, or North Las Vegas is not stuck behind a cross-valley drive at the worst possible time.

What does change by neighborhood is the house. Newer tracts tend to have PEX in the walls and an irrigation stub in the yard, which fails differently from the copper in older central-valley homes. Homes with a swamp cooler have a line running to the roof that gets forgotten every fall. If you are not sure where the exposed plumbing in your house is, that is a fair question to ask us on the phone, and we would rather answer it now than after a freeze.

Wherever you are, the sequence does not change. Shut the water down, find the real failure, show you what we found, and quote a flat rate you approve before anything gets opened. Kingdom Plumbing is family owned, has worked in this valley since 2018, and holds NV Contractors License #0085422. If you want the numbers before you call, the Las Vegas plumbing repair cost guide lays out what common repairs and larger jobs typically run.