To query a pipe riser, go to
Ribbon: DM Plumbing->Pipes-> 
Insert Pipe Riser
Pulldown Menu: DM Plumbing->Pipes->Query Pipe Riser
Select the pipe riser on the drawing to be queried.
Edit Riser Dialog Box
Changes can be made to the riser in the same way as when it was inserted. See the Insert Pipe Riser section for more information.