What to do in the first ten minutes
Do these in order. The first step matters more than the rest.
Shut off the main water valve
It turns clockwise and is usually where the pipe enters the house. In a well house, switch off the pump at the breaker.
Open a faucet low in the house
Draining the line takes pressure off the break.
Turn off electricity to wet areas
Only if you can reach the panel on dry floor. Never stand in water to reach a switch.
Protect what you can
Lift belongings, move rugs and use buckets or towels where water is coming through.
Photograph the damage and call
Date-stamped photos help your insurance claim.
Why pipes burst in winter and what Guilford's numbers say
Water expands when it freezes. Ice itself does not burst the pipe where it forms. The pressure builds between the ice and a closed faucet, and the pipe splits at its weakest point, often a section far from the ice. That is why a frozen pipe may show no damage until it thaws and water pours out.
The Connecticut State Building Code uses a frost depth of 42 inches, which tells builders how deep footings and underground pipes must be to stay clear of frost.
NOAA climate normals for 1991 to 2020 show a January average low of about 23 degrees Fahrenheit at the coastal New Haven Tweed station and about 20 degrees at the inland Mount Carmel station. Guilford falls in that range, and cold snaps far below the average are what burst pipes in unprotected walls, garages and crawlspaces.
Common causes and the first repair step
The cause decides whether the fix is a patch or a section replacement.
| Cause | Where it shows up | First repair step |
|---|---|---|
| Freezing | Exterior walls, garages, crawlspaces, hose bibs | Thaw safely, find the split, replace the section |
| Corrosion and pinholes | Copper or galvanized pipe, especially older runs | Replace the section, assess the rest of the line |
| Failed fitting or joint | Soldered or push-fit joints, old valves | Remake or replace the joint |
| Excess pressure | Houses without a working pressure regulator | Replace the regulator and the damaged pipe |
| Damage from work or digging | After renovation or a dug trench | Repair and confirm the line is marked next time |
Frozen pipes that have not burst yet
A frozen pipe is a warning. Act before it becomes a break.
- Keep the faucet open a trickle. Moving water and open outlets reduce pressure if the pipe splits.
- Warm the area gently. Use a hair dryer, a heating pad or a space heater at a safe distance. Never use an open flame.
- Warm from the faucet toward the frozen section. That way steam and melted water have somewhere to go.
- Open cabinet doors under sinks on exterior walls. Room air reaches the pipes behind them.
- Call if you cannot find or reach the frozen section. A plumber has the tools to thaw behind a wall.
Copper, galvanized and drain pipe repairs
Copper pipe is repaired by cutting out the damaged section and soldering or press-fitting in new pipe, or by adding a coupling where the pipe can be reached. Galvanized steel is much harder to patch, because threaded joints are corroded and one repair often leads to another. If the pipe has failed more than once, see repiping.
Drain pipes crack too. A cracked cast iron or plastic drain leaks every time a fixture empties, which can cause stains and mold in a ceiling below. The plumber finds the crack and replaces the section. Supply lines that have split behind a fixture, such as a washing machine hose, are quick repairs but a major source of water damage, so replacing the hose before it fails is cheap insurance.
Guilford homes with exposure: garages, cottages and crawlspaces
The shoreline colonies at Shell Beach, Indian Cove, Leete's Island and Sachem's Head began as summer communities, per the Guilford Preservation Alliance. Cottages converted to year-round use may have supply lines run through unheated crawlspaces or exterior walls. If a cottage sits empty in winter, shut off the water at the main and drain the lines.
Before any digging to reach a buried pipe, the state requires a call to 811 or the Call Before You Dig website at least two full working days before power equipment is used, and a contractor you hire must make the call. A plumber doing excavation handles it. See our notes on the water service line for buried-pipe repair.
What affects the price of burst pipe repair
The price is set by where the break is and how much has to be opened.
- Location.A pipe in an open basement is quick. A break in a plaster wall or a slab takes more work.
- Pipe material and the length to replace.Copper, PEX and galvanized differ.
- Water damage.Drying and rebuilding are separate trades and costs.
- How many breaks.A freeze often splits a pipe in several places.
- The hour.After-hours visits are quoted as emergencies.
A sudden burst is generally covered by homeowners insurance, while long-term corrosion and freezing from a lack of heat may not be. Check your policy and take photographs.
Pipe burst or frozen right now?
Call the 24/7 line, shut off the main and say where the water is coming from. If water has reached a basement, tell the dispatcher about your sump pump too.
Questions we hear on calls
Yes. A burst pipe is the clearest emergency we handle, and the line is open 24/7.
If the water supply is shut off and the tank cannot refill, turn off the heater to avoid damaging it. The plumber will advise.
Yes, if the pipe is reachable and not yet split. Use gentle heat from a hair dryer and never an open flame. Call if you cannot reach it.
Reachable pipe in a basement can be repaired in an hour or two. Pipes in walls and slabs take longer.
Often yes, if the house was kept heated. Policies differ, so ask your insurer.
The state code, which adopts the 2021 International Plumbing Code (IPC), exempts stopping leaks and repairing leaks that do not involve replacing or rearranging pipes, valves or fixtures. Replacing concealed pipe is new work that needs a permit. The plumber tells you which applies.
Insulate pipes in garages and crawlspaces, seal drafts around them, and let a faucet drip during a hard freeze.
Sources for the local details on this page
The local facts above come from the 2022 Connecticut State Building Code and Call Before You Dig homeowner guidance. Rules and figures can change, so check with the town or state office before you rely on them for a permit or a purchase.