I tried that and I still can't get the Id Material to change from ductile iron to DIP.
I changed the Id Material from 'ductile iron' to 'DIP' in the WA_MATERIAL_TBD table , row 22


then went to the WA_PIPE_MODEL and all Id Materials are set to "22"
Swapped a pipe from the catalog to reload it and the Id material is still ductile iron

I was able to change the description fields in the WA_PIPE_MODEL table from ductile iron to DIP

Those fields are updating, but not the Id Material field.
Is there a similar command to PARTCATALOGREGEN for pressure pipes? Is there a hidden field in one of the tables for the Imperial_AWWA_Pushon.sqlite database that has the Id Material to correctly change all pipes/fitting/appurtenances from 'ducitle iron' to DIP?
Let me know if I'm missing a step or...two.