What should be done first when a line splits in a cold snap?
Close the main shut-off, open a faucet on the lowest floor to relieve pressure, and keep electrical equipment away from the water. Then call. The thaw can release more water than expected.
Once the main is closed, the water drains out at the open faucet and the flow slows. Leave the faucet open while the building drains, and do not try to repair the line with tape until it is safe to work on.
If the water has reached an outlet or an appliance, turn off the circuit at the panel only if the panel is dry and you can reach it without wading. Otherwise leave the power off and say so when you call.
Why did the leak start days after the cold?
Because a split line can hold while it is frozen and begin to leak when the ice melts. The thaw is when the water finds the gap, and it can run into a wall for days before a stain appears.
A frozen line is not automatically broken, but it should be checked. Turn the tap on slowly once the building is warm. If the flow is weak or rusty, call a plumber rather than forcing it.
The thaw is the moment to be alert. Listen for running water in the walls, check the ceilings below the lines and look at the meter.
How far does a leak from a split line spread?
Further than the stain. Water follows the framing, runs down inside the wall and along the joists, and can reach a room some distance from the break.
A leak inside a wall travels down the stud bays until it meets a plate or a joist, then runs along that line. A ceiling stain may have come from a room two rooms away, so crews measure the path with readings.
The reach is recorded on a plan so the repair trades know where the wet framing is before they open anything.
Will the insurer pay for a split line?
Many standard policies cover sudden water damage from a burst pipe, but some exclude damage from freezing when the heat was off. Read the policy and ask the insurer in writing.
The most useful record for a claim is the time the water was shut off, the photographs of the damage and the readings that show how far the water went. Keep the failed section if it is replaced.
Ohio's Department of Insurance takes complaints about how a claim is handled, and the file is what makes a complaint specific.
How should lines be protected before the next cold?
Insulate the exposed lines, seal the gaps where cold air reaches them, keep the heat at a steady level and know where the main is. A plumber can advise on heat tape for the most exposed runs.
Lines in outside walls, garages and crawl spaces are the most at risk. Foam sleeves on the exposed runs and a sealed opening where a line enters are cheap steps that reduce the risk.
On the coldest nights let the taps on the most exposed line drip slightly, and keep cabinet doors open on outside walls so warm air reaches the pipes.
Finding a split line inside a wall
A split line in a wall is found with readings and a small opening, not by guessing.
A split supply line inside a wall often shows only as a damp patch or a stain on a ceiling. The crew reads the wall at several points with a moisture meter, and it marks the area where the reading is highest. A small opening is made only where the readings point, so the damage is kept small.
Once the line is found, the crew shuts off the water at the nearest valve and records the location. The repair is a plumber's job. The crew hands over the location and the wet area so the repair can be planned.
- Read the wall at several points with a moisture meter
- Mark the highest reading and the nearest valve
- Open the wall only where the readings point
- Shut off the water at the nearest valve
- Hand the location and the wet area to a plumber
Drying a frozen-line loss in the cold
Cold weather slows drying, so the crew sets heat and air to match the room.
When a line splits in a cold month, the house may have been cold for a while. Cold walls and floors dry slowly, and a damp room can stay damp for longer than expected. The crew sets heat and airflow for the room, records the room temperature on each visit and adjusts the plan if the drying is slow.
The homeowner should keep the room warm enough for the drying to run, and should not block the equipment or the vents. The crew will say what temperature it needs.
- Record the room temperature on each visit
- Set heat and airflow to match the material
- Keep vents clear and the equipment running
- Recheck the readings on the planned day
- Explain any slow reading in the scope
