Duo8 vs DUO QD Gas8: specs compared
Updated 05 September 2026.
6
specs differ
Duo8 and DUO QD Gas8 differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.
| Spec | Duo8 | DUO QD Gas8 |
|---|---|---|
| Designation | 8 mm (5/16") OD | grey QD, 8mm push-in tail |
| Size / thread | 8 mm (5/16") | snaps over the gas post; integrated 8mm push-in tail |
| Fitting form | push-in collet, metric | snap-on gas QD with integrated push-in |
| Seals on | double EPDM O-ring on the tube outer wall | O-ring over the post shoulder; 8mm push-in O-rings on the tube |
| Rating / role | fitting rated to 100 psi; EVABarrier tube burst over 300 psi at 25 C | the gas-side ball-lock disconnect with a built-in 8mm Duotight, no separate flare fitting needed |
| Tube OD | 8 mm |
Questions and answers
How do Duo8 and DUO QD Gas8 compare?
Duo8 and DUO QD Gas8 differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.