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Frozen pipes

No water, or a pipe has burst after a cold snap. Thaw gently or shut off fast.

Act carefully and stop if anything feels unsafe. When in doubt, call a professional.

A frozen pipe is not just an inconvenience; when it thaws it can burst and flood. Act before it does.

Quick checklist

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What to do, step by step

  1. 1

    Identify the frozen section

    Often an exterior wall or a cold loft.

    10 min
  2. 2

    Open the nearest tap

    Gives melting water somewhere to go.

    1 min
  3. 3

    Thaw gently

    Warm towels, a hairdryer on low, or a gentle heater. Never a blowtorch.

    30 min
  4. 4

    If it has burst, shut off the water

    Then treat it as a leak.

    5 min

What NOT to do

  • Never use a naked flame to thaw a pipe.
  • Do not pour boiling water on a frozen pipe; the shock can crack it.

Possible causes

Uninsulated pipes

Exterior walls and lofts.

Cold snap

Prolonged freezing temperatures.

Related situations

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Water is coming in or pooling. Stop the source, protect what you can, then repair.

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Water under the machine. Stop it, contain it, and decide whether it is a repair or a replacement.

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