Connect a Festool RTS 400 / DTS 400 sander port to a 2-1/2 in Ridgid / Craftsman locking hose
How to join a Festool RTS 400 / DTS 400 sander port to a 2-1/2 in Ridgid / Craftsman locking hose, and what stops it leaking dust.
Not compatible without stepping down. A 2-1/2 in Ridgid / Craftsman locking hose is far larger than the Festool RTS 400 / DTS 400 sander port, so it needs a 27 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 | Festool RTS 400 / DTS 400 sander port (1-1/16 in OD, 27 mm OD) |
|---|---|
| End B | 2-1/2 in Ridgid / Craftsman locking hose (2-1/4 in OD, 2-1/4 in ID) |
| Fit type | male port into hose cuff |
| Reducer needed | 27 mm to 2-1/2 in step reducer |
Shop notes
The port is about 27 mm and the hose about 57 mm, a gap of 30 mm, so the hose simply swallows the port with no contact. A 27 mm to 2-1/2 in step reducer is needed, and even reduced the airflow is mismatched between the Festool RTS 400 / DTS 400 sander port and the 2-1/2 in Ridgid / Craftsman locking hose.
Wrapping tape to close a 30 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
Shop 27 mm to 2-1/2 in step reducer on AmazonaffiliateFind 27 mm to 2-1/2 in step reducer on eBayaffiliateRelated connections
- Festool RTS 400 / DTS 400 sander port27 mm (D27) hose port
- 2-1/2 in Ridgid / Craftsman locking hose2-1/2 in, cuff approx 2-1/4 in OD
- DeWalt DWS779 / DWS780 miter saw port to 2-1/2 in Ridgid / Craftsman locking hoseneeds a reducer
- DeWalt miter saw dust elbow (1-1/2 in outer) to 2-1/2 in Ridgid / Craftsman locking hoseneeds a reducer
- DeWalt random-orbit sander stepped port to 2-1/2 in Ridgid / Craftsman locking hoseneeds a reducer
- DeWalt DW735 planer port to 2-1/2 in Ridgid / Craftsman locking hoseneeds a reducer