Here is how you map the shapefile pipe fields to the InfoSWMM data fields. One note, you had two diameter fields (feet and inches) and the feet column was mostly zero so I used the inch column. Here are the four steps and mapping you need to import all of the data from your shapefile. You will have to use blockedit and convert the diameter from inches to feet in the DB link table (Step 5 – note there are still three missing pipe diameters).
via Blogger http://www.swmm5.net/2013/07/importing-link-shapefile-into-infoswmm.html