Duotight 8mm (5/16") Gas Ball Lock Disconnect

Duotight 8mm Gas Ball Lock Disconnect – Kegging Fitting

Duotight 8mm (5/16") Gas Ball Lock Disconnect – Kegging Hardware

If you're running EVA Barrier lines and you’re tired of fiddling with hose clamps or wrestling vinyl tubing onto barbs, this Duotight 8mm gas disconnect is one of those upgrades that instantly makes your keg setup less annoying. It snaps right onto the gas post like any normal disconnect, but the push-in fitting on top means swapping or shortening gas lines takes about five seconds. Super clean, super simple.

Duotight 8mm Gas Ball Lock Disconnect – How It Works & What to Expect

The Duotight 8mm gas ball lock disconnect uses a push-in fitting that grabs your tubing tight as long as the cut is clean and square. Once it's seated, it holds pressure really well—in practice, it’s usually the clamps and barbs elsewhere in the system that leak before the Duotight does. The whole thing feels pretty compact and tidy, which is great if your kegerator is already a bit of a cable jungle.

What You Need to Use It

To get this running, you just need the usual kegging gear:

• Ball lock keg with a gas post
• 8mm (5/16") EVA Barrier or similar rigid tubing
• CO? tank and regulator
• Soapy water or sanitizer spray for leak checking

Product Specifications

• Connection Type: Ball lock (gas)
• Tubing Compatibility: 8mm (5/16") OD EVA Barrier or similar rigid tubing
• Fitting Style: Duotight push-in
• Material: Food-grade plastic with stainless internal components
• Pressure Rating: Typically up to 100 psi (well above normal kegging pressures)
• Use: Gas side only
• Footprint: Compact, low-profile design

A Brewer’s Tip

If you ever notice a tiny hiss or micro-leak, don’t assume the fitting is bad—most of the time it’s just a slightly rough or angled tubing cut.

A cheap little tube cutter gives you clean, square cuts and makes Duotight fittings seal first time, every time.

Frequently Asked Questions

Can I use soft vinyl tubing with this?
Not really. Duotight fittings work best with rigid 8mm OD tubing like EVA Barrier.

Does this replace a normal gas disconnect?
Yeah—it is your gas disconnect. It just uses a push-in fitting instead of a barb and clamp.

How do I release the tubing if I want to move things around?
Just push the little collar down while pulling the tubing out. No heat, clamps, or tools needed.