If a pipe has already burst or water is spreading, shut off the building’s water when safe and call (716) 637-4311 for 24/7 frozen and burst pipe service. Never enter standing water near electrical equipment.
Which pipes freeze first?
Water freezes when a pipe loses heat faster than the surrounding building can replace it. Air leaks, missing insulation, low indoor heat, and the pipe’s exact route all matter more than distance from an outside door.
Pipes against exterior walls
Unheated or drafty basements
Crawl spaces & rim-joist areas
Attached garages
Cabinets on outside walls
Laundry lines near foundations
Outdoor hose bibs & hoses
Seasonal additions & porches
Vacant rentals or unused rooms
One section can freeze while the rest of the building has normal water. A kitchen faucet with no flow may point to a branch line in an exterior wall. No water anywhere may involve the main supply, a utility interruption, or a private-well problem and needs a different check.
Warning signs of a frozen pipe
No water or only a small trickle from one faucet; a sudden pressure drop during severe cold; frost or condensation on an exposed pipe; a pipe that looks swollen or distorted; unusual sounds as a faucet opens; water stains or dripping that begin during a thaw; normal water in one part of the building but no flow in another. Do not keep opening and closing multiple fixtures if you suspect damage — first check for visible leakage and locate the main shutoff. A frozen pipe can hold back water like a temporary plug; the leak may appear only when that plug melts.
A pre-winter frozen-pipe checklist
Disconnect outdoor hoses
Remove garden hoses before freezing weather — a connected hose traps water at the faucet and increases freeze exposure. Drain and store it.
Seal cold-air leaks
Check foundation penetrations, basement windows, sill plates, rim joists, utility openings, and crawl-space access — without blocking required vents or drains.
Insulate vulnerable pipes
Insulation slows heat loss but doesn’t create heat. Cover full runs including elbows and fittings. Follow heat-cable product instructions exactly.
Keep the building heated
Maintain steady heat during cold spells and open interior doors so heated air can circulate; open cabinet doors under exterior-wall sinks.
Test the main shutoff before winter using the safe process in the main water shutoff guide. Do not force a corroded valve.
What to do during a deep freeze
Keep safe, consistent heat running and monitor known cold areas. Open sink cabinets on exterior walls when appropriate. Allowing a small amount of water to move through a particularly vulnerable line can reduce freezing risk during extreme cold — the American Red Cross notes that even a trickle can help, and the Jamestown BPU customer handbook advises customers who believe service lines are at risk to keep water moving during extreme cold. This is a short-term protective step, not a substitute for correcting drafts, insulation, or pipe placement.
Do not run every faucet unnecessarily. Focus on a known vulnerable line and make sure the drain is clear and monitored. A sink left running into a blocked drain can create a different flood. See the American Red Cross frozen-pipe guidance for additional safety steps.
How to respond when a pipe is frozen
Check for a split or leak first
Look for spraying water, dripping, a bulge, a crack, or wet insulation. If damaged, close the main supply when safe and call for repair.
Keep the affected faucet open
Gives melting ice and steam a path out and lets you see whether flow is returning.
Apply gentle heat only if accessible
A hair dryer on low, a heating pad, or warm towels — start near the open faucet and work toward the colder area.
Never use: a blowtorch or open flame, a charcoal stove, a propane or kerosene heater directed at the pipe, boiling water, or unattended high-heat equipment. The Red Cross specifically warns against open-flame thawing because of fire and pipe-damage risk.
Stop when the pipe is hidden or unsafe — do not cut open a wall or energize a wet area just to reach a frozen line. Arrange an inspection if the blockage cannot be reached safely or the same line freezes repeatedly.
If the frozen pipe bursts
Close the building’s main water shutoff if the route is dry and safe. Keep people away from water near outlets, appliances, panels, or heating equipment. Open a lower cold-water faucet briefly to reduce remaining pressure. Move undamaged belongings only when it is safe. Call for emergency plumbing repair. Photograph visible damage for your records once the area is safe. Do not restore full pressure until the damaged pipe has been repaired and checked — a small split can release substantial water once the ice blockage disappears.
Preventing repeat freezing
Thawing the same pipe every winter is not a lasting solution. The repair plan should address why that location loses heat: sealing the draft, extending pipe insulation, improving heat circulation, moving the pipe deeper into conditioned space, replacing a damaged section, correcting an exterior faucet arrangement, adding monitored heat cable, or repairing a basement window or foundation gap.
Plumbing inspection and maintenance can trace the full pipe route and distinguish a one-time cold-weather event from a repeating building condition.
Vacant homes, rentals & seasonal properties
An empty building carries greater risk because nobody notices the first pressure loss, furnace problem, or leak. Before a winter vacancy: keep reliable heat, confirm utilities stay active, close and drain plumbing only when compatible with the building’s systems, protect water heaters and pumps correctly, give a local contact access, arrange checks after severe cold, and record the main shutoff location and emergency contacts.
Do not assume shutting the main valve alone winterizes the building — water can remain in low points, appliances, fixtures, water heaters, pumps, and traps. Landlords should make winter responsibilities clear before a unit becomes vacant.
Frozen-pipe FAQs
At what temperature do pipes freeze?
Water freezes at 32°F, but a pipe’s risk depends on exposure time, wind and air leakage, insulation, water movement, and nearby heat. Outdoor temperature doesn’t tell you the temperature inside a wall or crawl space.
Should I let a faucet drip all winter?
No — a limited trickle may help a known vulnerable pipe during severe cold, but it wastes water and doesn’t correct the cause. Fix drafts, insulation, and pipe routing where practical.
Can I thaw a frozen pipe with a space heater?
Portable heaters create fire and electrical risks in cramped basements or wet areas. Never leave one unattended. Gentle direct heat on an accessible pipe is safer; call for help when the pipe is hidden or unsafe.
Why does only one faucet stop working?
That usually means the branch serving that fixture passes through a colder area. Compare hot and cold flow and check nearby fixtures, but check for leaks before assuming the line is intact.
What if the whole house has no water?
Check whether neighbors have service and whether the main valve is open. On a private well, a pump, pressure tank, power, or frozen-line problem may be involved.
Does a frozen pipe always burst?
No, but you cannot confirm safety from lack of visible leakage while it remains frozen. Pressure can damage the pipe away from the ice, and leakage may begin only after thawing.
Can homeowners insurance cover a burst pipe?
Coverage depends on the policy, circumstances, and maintenance requirements. Ask the insurer directly and document the event — don’t delay the water shutoff or repair while waiting for a coverage answer.
Prepare before Jamestown’s next cold spell
For a frozen or burst pipe now, call 24/7.