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Old Cement Meters

Material hazen-williams coefficient - c-abs - acrylonite butadiene styrene 130 aluminum 130 - 150 asbestos cement 140 asphalt lining 130 - 140 brass 130 - 140 brick sewer 90 - 100 cast-iron - new unlined cip 130 cast-iron 10 years old 107 - 113 cast-iron.