| | Please download the following files and information for your use.  | NCPI Toolbox. Includes programs for hydraulic calculation of sewer projects, trench loading analysis, bedding cost calculator and life cycle costs developed by the National Clay Pipe Institute. These programs are of proven value and have extensive research for the results.
| | Flow Characteristics of sewer pipes comparing vitrified clay pipe to pvc in actual use for sanitary sewers where sliming must be considered. Frequent information is provided of theoretical flow roughness based upon clean water conditions in the laboratory and do not reflect real world conditions. |
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