Warning · MEP
How to fix Disconnected MEP segment
in IFC files
Connect MEP segments through ports — disconnected pipes/ducts export without IfcDistributionPort relationships and break system tracing.
Check your IFC file — free
No account · No upload · Runs in your browser · 38 validation checks
What it means
The Disconnected MEP segment check
IfcPipeSegment / IfcDuctSegment has no IfcDistributionPort connection
The fix
How to fix Disconnected MEP segment in your authoring tool
Concrete, tool-specific steps. The check itself is schema-agnostic and works for IFC2x3, IFC4, IFC4x1 and IFC4x3.
| Authoring tool | How to fix |
|---|---|
| Revit | Disconnected ducts/pipes export without ports. Fix open connectors in the MEP model (no gaps/loose ends), keep segments joined into connected systems, and enable system/port export so IfcDistributionPort relationships are written. |
| ArchiCAD | Use the MEP Modeler so routes stay connected end-to-end; export MEP systems to include ports/connections. |
| Tekla | MEP is not Tekla’s domain; model connected MEP in the dedicated MEP tool so segments carry ports, then federate. |
| Allplan | Model MEP runs connected end-to-end (no open ends) so the IFC export writes distribution ports between segments. |
How it works
Find and fix it in the browser
The whole flow runs client-side — your IFC file never leaves your machine.
01
Open your IFC file
Open IFC Viewer Online and drag & drop your IFC file. It is parsed locally in your browser via WebAssembly — nothing is uploaded.
02
Run the Health Score validation
Run validation. The "Disconnected MEP segment" check (RULE_CONNECTED_MEP) flags every affected element and pinpoints it in the model tree.
03
Fix in Revit
Disconnected ducts/pipes export without ports. Fix open connectors in the MEP model (no gaps/loose ends), keep segments joined into connected…
04
Fix in ArchiCAD
Use the MEP Modeler so routes stay connected end-to-end; export MEP systems to include ports/connections.
05
Fix in Tekla
MEP is not Tekla’s domain; model connected MEP in the dedicated MEP tool so segments carry ports, then federate.
06
Fix in Allplan
Model MEP runs connected end-to-end (no open ends) so the IFC export writes distribution ports between segments.
07
Re-validate
Re-export from your authoring tool and re-run validation to confirm the issue is resolved and your Health Score improved.
Related checks
Other MEP checks →
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