If you selected Actual (OD) in the Header Dimension Basis list, then enter the actual outside diameter of the pipe. If you selected Nominal in the list, enter the nominal outside diameter of the branch pipe. For example, enter 10 for a 10-inch pipe.
If you selected Actual (OD) in the Header Dimension Basis list, then enter the actual outside diameter of the pipe. If you selected Nominal in the list, enter the nominal outside diameter of the branch pipe. For example, enter 10 for a 10-inch pipe.