Connect Ball-lock quick disconnect to Duotight 8mm push-in
How to join ball-lock QD, MFL or barb tail and 8 mm (5/16") OD, and what stops it leaking.
Not a direct fit. Joining Ball-lock quick disconnect to Duotight 8mm push-in needs a Duotight 8mm to FFL fitting (onto the disconnect MFL tail).
The two ends
- End A
- Ball-lock quick disconnect (ball-lock QD, MFL or barb tail)
- End B
- Duotight 8mm push-in (8 mm (5/16") OD)
- A seals on
- O-ring seals over the post shoulder; the tail seals by flare or clamp
- B seals on
- double EPDM O-ring on the tube outer wall
- Part needed
- Duotight 8mm to FFL fitting (onto the disconnect MFL tail)
The part to buy
To put EVABarrier 8mm line on a ball-lock disconnect with an MFL tail, use a Duotight 8mm to FFL fitting. Its female flare screws onto the disconnect tail and its push-in end grips the 8mm tube. This is the common way to run push-in line to a corny keg.
Check the disconnect tail: most are MFL, which needs an FFL-ended Duotight. If yours is a barb-tail disconnect instead, you want vinyl line and a clamp, not a push-in flare fitting. Buy the fitting to match the tail you actually have.
Related connections
Sources: Keg Outlet corny keg disconnects (ball lock and pin lock, MFL/barb tails) · DraftMag ball lock vs pin lock disconnect comparison · KegLand Duotight push-in fittings (manufacturer) · KegLand EVABarrier 4mm ID x 8mm OD tubing (manufacturer)