When performing a Change Service and Size operation on a Fabrication Pipe network that includes couplings, the behavior at the coupling locations is inconsistent and problematic.
Use Case:
Initial network: Sanitary service with 3" pipe size (having couplings)
Desired change: Switch to Cold Water service with 2" pipe size
The system successfully updates the pipe size and service throughout the network.
Issue:
At the locations where couplings exist, Revit does one of the following:
Breaks the pipe network, resulting in disconnected elements
Or, merges pipes unexpectedly, potentially removing the coupling or altering connectivity
Expected Behavior:
Couplings should remain in place (if compatible) or be replaced with the appropriate part from the new service. The pipe network should remain continuous without requiring manual intervention to fix broken connections.
Questions:
Is this expected behavior when couplings are involved?
Are there known best practices or steps to preserve connectivity and fittings during a service/size change?
Any recommendations for maintaining network integrity when performing bulk service/size modifications in fabrication models?
