The automated design feature of GVF-Convex solver is for gravity pipes only. Pressure pipe sizes must be selected by the engineer.
There is a similar forum thread, please have look at it. It explains about GVF-Convex solver in SewerCAD for pressure pipes..
http://communities.bentley.com/products/hydraulics___hydrology/f/5925/p/60334/145213#145213
Regards,
Sushma Choure
Bentley Technical Suppport
Answer Verified By: nkg2