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Manhole Sizing Guidelines

Manhole Sizing Guidelines

Many specifications, such as MMCD, explicitly state the minimum manhole diameter allowed based on the diameter of the incoming pipes. However, there are also physical and structural requirements that may require the manhole diameter to be increase based on the quantity and orientation of the entering pipes.

Click the below link to see an illustration of standard maximum allowable pipe diameters for various manhole diameters. If you are unsure what size of manhole would be required for your specific project feel free to contact Ocean Pipe’s engineering staff who will gladly assist you.

Manhole Sizing Guidelines