I work in Hammer.
How to model a cap at end of pipe.?
This does not seem to be related to OpenBridge or OpenTunnel - which Bentley product are you working with?
I work with Hammer software.
This Forum is for Bentley OpenBridge/OpenTunnel/LARS products.
Please post your question to OpenFlows | Water Infrastructure Forum - OpenFlows | Water Infrastructure - Bentley Communities forum page.