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Why do frozen water pipes burst open?

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asked Sep 17, 2017 in Maintenance/Repairs by Ahmed (600 points)
Why do frozen water pipes always burst open?

Last winter I had frozen water pipes and the frozen pipes burst.

What causes the pipes to burst?

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answered Sep 17, 2017 by dyt40 (470 points)
When the pipes have ice in them the ice starts to expand under pressure and that's usually what causes the pipe to burst.

When a pipe is frozen you should open the faucet to relieve the pressure when the pipe starts to thaw.

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