Measuring Pipes and Pipe FittingsExplore further
2017-7-13u2002·u2002Pipe OD measures about 3/8 inch larger than the nominal size. Plastic and steel. Plastic and steel pipe with the same nominal size have the same OD. Convert OD measurements to nominal size with the following table. Fit the Fittings . Fittings join pipes together. How a fitting connects pipes depends on the type of pipe:
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