These connect directly. Duotight ball-lock liquid QD (9.5mm) mates with EVABarrier 6.3mm ID x 9.5mm OD line without an adapter. Sealing method, the real-world trap, and the exact part to buy.
Updated 05 September 2026.
Connect Duotight ball-lock liquid QD (9.5mm) to EVABarrier 6.3mm ID x 9.5mm OD line
How to join black QD, 9.5mm push-in tail and 6.3 mm ID / 9.5 mm OD, and what stops it leaking.
These connect directly. Duotight ball-lock liquid QD (9.5mm) mates with EVABarrier 6.3mm ID x 9.5mm OD line without an adapter.
The two ends
- End A
- Duotight ball-lock liquid QD (9.5mm) (black QD, 9.5mm push-in tail)
- End B
- EVABarrier 6.3mm ID x 9.5mm OD line (6.3 mm ID / 9.5 mm OD)
- A seals on
- O-ring over the post shoulder; 9.5mm push-in O-rings on the tube
- B seals on
- the 9.5mm OD is what a Duotight 9.5mm or John Guest 3/8 collet grips
- Part needed
- none, direct fit
The 9.5mm integrated liquid disconnect takes EVABarrier 6.3mm ID x 9.5mm OD line straight in, no flare step. It is the 3/8-line version, common on longer UK beer runs where a wider bore lowers pour resistance.
It will not accept 8mm line, so match the disconnect size to your beer line. The 9.5mm push-in seals on the tube wall, so cut square, and keep it on the liquid post because it is keyed to that side.
Related connections
Questions and answers
Connect Duotight ball-lock liquid QD (9.5mm) to EVABarrier 6.3mm ID x 9.5mm OD line?
These connect directly. Duotight ball-lock liquid QD (9.5mm) mates with EVABarrier 6.3mm ID x 9.5mm OD line without an adapter.