Generate a concentric pipe reducer run
A hollow transition between two pipe sizes, sharing a common centreline. Concentric reducers keep the axis straight, which suits vertical runs and most general piping; the tapered section maintains flow without an abrupt step.
What it is used for
- Piping and ducting size transitions
- Pump and valve connections
- Ventilation and extraction runs
- Process pipework
Dimensions that matter
| Large diameter | The bigger pipe size. |
| Small diameter | The smaller pipe size. |
| Wall thickness | State it explicitly; otherwise a schedule-typical wall is used. |
What you get
A real solid model you can rotate and measure, plus downloadable STEP (machining and CAD), STL and 3MF (3D printing) and DXF (laser and waterjet) files. Optional built-in analysis covers stress (FEA), thermal, buckling, cost and manufacturability.
Before you see it, the built geometry is measured against the dimensions you stated, checked as a valid watertight solid, and — for assemblies — checked for interference. These are geometry and physics checks; they do not confirm the shape matches what you pictured, so review the 3D view or 2D drawing before relying on the part.
Previewing is free. Downloading is £2.99 per part, or unlimited on Pro (£29/month, £290/year).
Related parts
Common questions
What file formats do I get?
STEP, STL, 3MF and DXF — the formats CNC shops, laser cutters and 3D printers accept.
Can I change the dimensions afterwards?
Yes. Edit the numbers directly, or describe the change in plain English. Every edit is rebuilt and re-checked.
Do I need CAD experience?
No. Describe the part and its sizes in millimetres.
Is it free to try?
Yes — describing a part and viewing the 3D preview costs nothing.