duotight – 8mm (5/16) Screwlock x 8mm (5/16) Elbow

This fitting is a push-in style fitting designed for quick and tool-free setup, allowing you to simply push the line firmly in from both sides until it seats. It is mainly used where a stronger, high-pressure, or leak-resistant connection is required on a rigid port, preventing accidental dislodgement under vibration or pressure spikes.

One side features a standard 8mm (5/16″) duotight push-in fitting, utilizing dual EPDM O-rings for optimal sealing. The other side is a compression-adapted duotight featuring a Screw Lock collar, which allows you to hand-tighten the fitting around rigid tubing to create an extra secure mechanical grip.

It can be used on any 8mm OD rigid or semi-rigid tubing, including EVABarrier, stainless steel, or copper. For example, it secures perfectly onto the 8mm stainless steel lines on a G40.1 Glycol Chiller to ensure glycol lines remain leak-free under continuous pump pressure.

It is also ideal for mounting directly onto an oxygenation wand / carbonation wand, providing a robust connection point that withstands frequent handling during aeration or carbonation procedures.

For installation, ensure your tubing is cut clean and square using a dedicated tube cutter rather than scissors, as a straight cut ensures a proper seal against the internal O-rings. When attaching the Screw Lock side, push the tube fully into the fitting before tightening the locking collar down by hand.

This fitting line also includes a 1/4″ (6.35mm) reducer option down to an 8mm Screwlock for tight spaces or transitioning between different hose sizes:

Applications & Compatibility

• G40.1: Attach directly to the stainless steel lines.
• Oxygenation/carbonation wand: Attach the screwlock to the end of the wand.
• Line to line: Join two 8mm OD lines together, secure in the knowledge that they are, in fact, secure.

8mm Tubing Compatibility

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