The duotight 8mm to FFL Female adapter is the industry standard for connecting 8mm OD beer or gas line to threaded fittings. Designed specifically for MFL Threaded Ball Lock and MFL Pin Lock Disconnects, this fitting allows for a tool-free, clamp-free connection that is 100% airtight.

Applications & Compatibility

• MFL Disconnects: Screw directly onto Grey (Gas) or Black (Liquid) MFL Ball Lock or Pin Lock disconnects.
• Regulators: Fits MK4 Regulators and other homebrew CO2 regulators with MFL outputs.
• Threaded Fittings: Compatible with any 1/4" MFL male thread.

This fitting is not required for the MK5 Regulator.

8mm Tubing Compatibility

This 8mm duotight fitting is optimised for use with EVABarrier Dual Barrier Line. It is compatible with:

• KL06224: 4mm ID x 8mm OD | 12m
• KL06231: 5mm ID x 8mm OD | 12m
• KL42741: 5mm ID x 8mm OD | 12m (Red)
• KL42765: 4mm ID x 8mm OD | 12m (Black Lightshield)

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The duotight Generation 2 Difference

Why settle for standard push-in fittings? duotight Generation 2 represents a massive leap in engineering over traditional acetal fittings.

Dual-Material Double O-Ring Design

The secret to our superior seal is a two-stage system using two different high-quality materials:

1. EPDM O-Ring: Provides exceptional chemical and gas resistance.
2. Silicone O-Ring: Maintains its shape and elasticity in sub-zero temperatures.

High-Performance Materials (POK)

Instead of standard Acetal, Generation 2 fittings are made from Polyketone (POK).

• Higher Chemical Resistance: Withstands harsh brewery cleaners.
• UV Protection: Won't become brittle over time.
• Extreme Durability: Rated for over 300psi @ 25°C.

User-Friendly Features

• Color-Coded Collets: Black denotes 8mm (5/16").
• Depth Indicators: Includes >| |< indicators so you know the hose is fully seated.
• No Clamps Necessary: Simply push to seal; push the collet to release.

We recommend using a Tube Cutter to ensure a perfectly straight, burr-free cut. An angled cut is the #1 cause of leaks in push-fit systems.