Hello Margarita,
Unfortunately there is currently no PDF user guide available for SewerCAD V8i. However, I confirmed that this is one of our top priorities, so please check the Http://Docs.Bentley.com page again soon.
Note that all of the material in our PDF user guides is also available in the internal help documentation, included with each program. (For SewerCAD V8i, it would be under Help > SewerCAD Help.)
Regards,
Jesse Dringoli
Bentley Technical Support
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.