Specifies an option code. If you type 1, the software uses the default commodity defined in the Default Piping Commodity Selection Rule. Valid entries are listed in the AllCodeLists.xls workbook on the CommodityOption sheet in the Codelist Number column. The option code gives the software a way of recognizing the default component when more than one component works. This code is also used when selecting a branch fitting. This option is ignored in the automated selection of flanges.