8mm (5/16") Duotight Fittings

The range of 8mm Duotight fittings offers the perfect solution for fast, reliable, and leak-free connections in your homebrewing or beverage system. Designed for use with EVABarrier 8mm (5/16”) Outside Diameter tubing as well as 8mm Duotight compatible barbs, these push-fit fittings provide an airtight seal without the need for clamps or tools. Duotight fittings make assembly and disassembly fast, easy and tool-less.

Made from high-quality engineering plastics, Duotight fittings are rated for both gas and liquid, making them ideal for CO₂ lines, draft beer systems, water filtration setups, and more. Each fitting features the signature double O-ring seal for superior hold and leak resistance, even under pressure.