Thawing, repairing and preventing frozen pipes
Frozen and burst pipe repair in York, PA
If a faucet gives you a trickle or nothing at all on a bitter cold morning, a pipe feeding it is probably frozen. Thawing it quickly and safely, before pressure builds and splits it, is the priority. If it has already burst, shut the main valve: the leak usually doesn't show until the ice thaws.
Water pouring or sewage backing up? Shut the main water valve, then call (717) 297-8733.
Emergency stepsSigns of a frozen or burst pipe
- No water, or only a trickle, from one or more faucets on a very cold morning
- Frost on an exposed pipe, or a pipe that's visibly bulged
- One fixture works and another doesn't, often a kitchen or bathroom on an outside wall
- Water appearing after a cold snap ends, dripping from a ceiling or pooling on a basement floor as the ice thaws
- A hissing sound in a wall once water starts flowing again
- An outdoor faucet that leaks inside the first time it's used in spring, a common sign it froze and split over the winter
Why pipes freeze in York homes
York County is in climate zone 4A. Winters are mostly moderate, which is part of the problem: most nights don't threaten pipes, so the weak spots go unnoticed until a cold snap with wind drops temperatures well below freezing for several days. The pipes that freeze are the ones exposed to that cold:
- Supply lines in exterior walls, especially kitchen sink lines and bathroom lines on the north or windward side
- Pipes in crawlspaces and unheated basements, and near foundation vents or gaps
- Lines over garages and enclosed porches, or in additions built over an open crawlspace
- Outdoor faucets that weren't shut off and drained, or older faucets that aren't frost-free
- Pipes near a dryer vent, sill gap or rim joist where cold air leaks in
In older York brick homes, a plumbing run along an uninsulated masonry exterior wall or through an enclosed back porch is a frequent trouble spot. Newer homes are less prone to it, but garages and bonus rooms over garages are common culprits.
Why a frozen pipe bursts away from the ice
Water expands as it freezes. Once an ice plug forms, the water trapped between the ice and a closed faucet has nowhere to go, and pressure builds until the pipe splits, usually a short distance from the ice. That's why opening the faucet helps prevent bursts, and why a burst pipe often doesn't leak until it thaws.
How frozen and burst pipe repair works
- Stop the water at the main or the closest working valve.
- Find the frozen section by checking which fixtures have water and tracing the pipe route.
- Thaw it safely with controlled heat, starting from the faucet end so melting water can escape.
- Find any splits by restoring pressure section by section and watching for leaks.
- Repair the damaged pipe. A split section is cut out and replaced with copper or PEX. PEX tolerates freezing better than copper, which is useful on runs that have frozen before.
- Fix the cause, where possible: insulating the pipe, sealing the air leak, adding a frost-free outdoor faucet, or rerouting the pipe away from the outside wall.
- Test under full pressure before walls are closed.
How much does burst pipe repair cost?
Burst pipe repair cost depends on where the split is and how many there are; a pipe in an open basement is a short repair, while one inside a finished wall, or several splits after a long cold snap, takes more work.
- Where the frozen or split section is. A basement pipe is quick; one inside a finished wall or ceiling isn't.
- How many splits there are. A long cold snap can split a pipe in several places.
- Rerouting. Moving a run away from an outside wall prevents a repeat but adds work.
- Insulation and air sealing done at the same time.
- Water damage. Drying and repairing walls, ceilings and floors is separate from the plumbing.
- Timing. Frozen pipes happen in the coldest weather, often outside normal hours, which costs more than scheduled work.
When a frozen pipe needs an emergency plumber
Call right away if:
- A pipe has burst and water is coming through a ceiling, wall or floor
- The main shutoff won't close
- You have no water at all in the house during freezing weather
- The heat has failed and pipes are at risk of freezing throughout the house
- Water is near the electrical panel or a light fixture
While you wait: shut the main valve, open the faucets the frozen pipe feeds, turn off the water heater (gas to pilot or off, electric at the breaker) if the water will be off for a while, move belongings out of the way, and take photos for insurance.
How to prevent frozen pipes in winter
- Disconnect garden hoses in the fall and shut off and drain outdoor faucets, or install frost-free ones.
- Insulate exposed pipes in crawlspaces, garages and unheated basements with foam pipe insulation.
- Seal air leaks near pipes at the sill, rim joist, and foundation vents.
- Keep the heat at 55°F or higher when you're away.
- Open sink cabinets on outside walls during a cold snap, and let a vulnerable faucet drip.
- Know where your main shutoff is, and make sure it works. Replace an old gate valve with a quarter-turn ball valve.
Frozen pipe repair is part of the plumbing services we provide around York. If water got into the structure, a leak check a few days later makes sure no second split was missed.
Frozen and burst pipe FAQs
Why did my pipe freeze when the heat was on?
The thermostat only measures the air in the middle of the room. Inside an outside wall or a crawlspace it can be much colder, so pipes along exterior walls, over unheated porches or garages, or near a gap in the foundation can freeze during a hard cold snap even in a heated house. Wind through a gap makes it much worse.
Should I let faucets drip when it's very cold?
On faucets fed by pipes that have frozen before, or that run along outside walls, yes. A slow drip of both hot and cold relieves pressure and keeps water moving. Opening the cabinet doors under sinks on outside walls also helps warm air reach the pipes.
How long does it take a pipe to freeze?
It depends on the temperature, wind and insulation. An exposed pipe in an unheated space can freeze within hours in a hard freeze. Pipes that froze once will freeze again under the same conditions unless something changes.
Can I thaw a pipe myself?
If you can reach it, a hair dryer or a space heater kept at a safe distance works. Start near the faucet and work back.
Never use a torch or open flame, which starts house fires and can boil water inside the pipe. If you can't find the frozen section, or it's inside a wall, call a plumber.
What should I do before leaving the house in winter?
Keep the heat at 55°F or higher, open sink cabinet doors on outside walls, and for a long trip consider shutting the main valve and draining the lines. Ask someone to check the house during a cold snap.
Plumbing Pros
Frozen or burst pipe in York? Call now
Call (717) 297-8733. Shut the main valve first if anything is leaking, and tell us which fixtures have no water.
Open 24 hours a day, 7 days a week