Connect Duotight 6.5mm push-in to MFL male flare (1/4")
How to join 6.5 mm (1/4") OD and 1/4" MFL (7/16"-20 UNF), and what stops it leaking.
Not a direct fit. Joining Duotight 6.5mm push-in to MFL male flare (1/4") needs a Duotight 6.5mm to 1/4 MFL flare fitting.
The two ends
- End A
- Duotight 6.5mm push-in (6.5 mm (1/4") OD)
- End B
- MFL male flare (1/4") (1/4" MFL (7/16"-20 UNF))
- A seals on
- double EPDM O-ring on the tube outer wall
- B seals on
- metal 45 degree flare face, never PTFE tape
- Part needed
- Duotight 6.5mm to 1/4 MFL flare fitting
The part to buy
The male-flare version takes 4mm ID x 6.5mm OD EVABarrier onto a female flare port or an FFL swivel: the push-in end grips the thin tube, the MFL end seals on the 45 degree flare of the matching FFL.
Decide male or female by what you are screwing into. An MFL fitting needs an FFL on the other side; two MFL ends will not join. The flare seals on its face, so keep it clean and never tape a flare.
Related connections
Sources: KegLand Duotight 6.5mm push-in fitting (EVABarrier 4mm ID x 6.5mm OD) · HowdyBrewer Duotight 6.5mm (1/4in) x 8mm (5/16in) reducer (KB01153) product data · MoreFlavor thread types explained (MFL/FFL, NPT, BSP) · KegLand Duotight 9.5mm x FFL (7/16-20 UNF, 1/4 SAE) product data · SAE J512 45 degree SAE flare (7/16-20 UNF) fitting reference