1-1/4 in shop-vac hose diameter vs 4 in dust-collector hose diameter: specs compared
Updated 05 September 2026.
102 mm
4 in dust-collector hose diameter wins on mating diameter
On mating diameter, 4 in dust-collector hose diameter leads: 102 mm versus 32 mm.
| Spec | 1-1/4 in shop-vac hose diameter | 4 in dust-collector hose diameter |
|---|---|---|
| Fitting type | female cuff (goes over a port or into a socket) | female cuff (goes over a port or into a socket) |
| Inner diameter / bore (ID) | 1-1/4 in, 32 mm | 4 in, 102 mm |
| Cuff outer diameter (OD) | approx 1-1/2 cuff in | 4-1/4 port in |
| Nominal size | 1-1/4 in (approx 32 mm) | 4 in ID |
| Mating diameter (mm) | 32 | 102 |
Questions and answers
Which has the higher mating diameter, 1-1/4 in shop-vac hose diameter or 4 in dust-collector hose diameter?
On mating diameter, 4 in dust-collector hose diameter leads: 102 mm versus 32 mm.
How do 1-1/4 in shop-vac hose diameter and 4 in dust-collector hose diameter compare?
On mating diameter, 4 in dust-collector hose diameter leads: 102 mm versus 32 mm.