Connect a Fein 30 mm tool port to a 2-1/2 in shop-vac hose
How to join a Fein 30 mm tool port to a 2-1/2 in shop-vac hose, and what stops it leaking dust.
Not compatible without stepping down. A 2-1/2 in shop-vac hose is far larger than the Fein 30 mm tool port, so it needs a 30 mm to 2-1/2 in step reducer.
Rings drawn to scale from the measured diameters in the table below.
The two ends
| End A | Fein 30 mm tool port (1-3/16 in OD, 30 mm OD) |
|---|---|
| End B | 2-1/2 in shop-vac hose (2-1/4 in OD, 2-1/4 in ID) |
| Fit type | male port into hose cuff |
| Reducer needed | 30 mm to 2-1/2 in step reducer |
Shop notes
The port is about 30 mm and the hose about 57 mm, a gap of 27 mm, so the hose simply swallows the port with no contact. A 30 mm to 2-1/2 in step reducer is needed, and even reduced the airflow is mismatched between the Fein 30 mm tool port and the 2-1/2 in shop-vac hose.
Wrapping tape to close a 27 mm gap never seals cleanly and chokes the airflow further. Step the sizes properly, or pair each end with a fitting closer to its own size.
The reducer to buy
Search Amazon for 30 mm to 2-1/2 in step reduceraffiliate searchRelated connections
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