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Old 06-16-2010, 06:48 PM   #1
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frozen city sewer line


how far below the ground does the freezing that causes problems begin at

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Old 06-16-2010, 06:56 PM   #2
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frozen city sewer line


If you connecting to a city sewer line the elevation of the existing line is what controls. THis is not the same as the frost level because of the heat normally carried by a sewer line contnts and the. - Not like preventing a footing in an unoccupied building from heaving.

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Old 06-17-2010, 06:13 AM   #3
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frozen city sewer line


It depends on where your located, up here in the northeast, drainage piping is required to be installed 4 feet below grade, water piping 5 feet below grade. The further south you go, the frost line is higher, so the drainage piping can usually be installed higher in the ground.
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