Did you know that pipe sizes are in NB which is Nominal Bore? This is NOT the outside measurement of the pipe. The outside diameter (OD) is the only constant measurement in pipe. The internal diameter (ID) changes depending on the wall thickness. So if you need to match pipe, please measure the OD of the pipe and check our Pipe Size Spreadsheet to know the NB or give us a call.
Pipe Sizing Frustrations
Tags: Fun fact