DUO QD Liq8 vs EVA 63id: specs compared
Updated 05 September 2026.
6
specs differ
DUO QD Liq8 and EVA 63id differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.
| Spec | DUO QD Liq8 | EVA 63id |
|---|---|---|
| Designation | black QD, 8mm push-in tail | 6.3 mm ID / 9.5 mm OD |
| Size / thread | snaps over the liquid post; integrated 8mm push-in tail | 6.3 mm inner diameter, 9.5 mm outer diameter double-wall EVA line |
| Fitting form | snap-on liquid QD with integrated push-in | double-wall EVA beer / gas tubing |
| Seals on | O-ring over the post shoulder; 8mm push-in O-rings on the tube | the 9.5mm OD is what a Duotight 9.5mm or John Guest 3/8 collet grips |
| Rating / role | the liquid-side ball-lock disconnect with a built-in 8mm Duotight | the 9.5mm-system line; the wider 6.3mm bore suits longer beer runs and UK 3/8 dispense |
| Tube OD | 9.5 mm |
Questions and answers
How do DUO QD Liq8 and EVA 63id compare?
DUO QD Liq8 and EVA 63id differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.