How Deep Should I Dig My Water Line?

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Water lines must be installed according to code.

The proper depth to dig and install a water line depends upon your location. A water line needs to be deeper in colder climates. Local building codes will provide information on the proper water line depth for your area.

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Frost Line

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A water line must be installed below the frost line to prevent freezing. The frost line depth can vary between different counties within a state.

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Cold Climates

The building code for the State of Maryland requires that a water line be installed at least 36 inches beneath the ground. The minimum water line depth ranges from 36 inches to 60 inches in Indiana, but varies between counties.

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Warmer Climates

The building codes in Placer County, California require that a water line be installed at least 12 inches beneath the ground. The measurement is taken from the top of the water line.

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