The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. 

duotight – 8mm (5/16”) Female x 8mm (5/16”) Female Push In Joiner

$3.95
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The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. 
  • The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. 
  • The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. 
  • The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. 
  • The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. 
  • duotight – 8mm (5/16”) Female x 8mm (5/16”) Female Push In Joiner - KegLand
  • The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. 
  • The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. 
  • The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. 
  • The double o-ring system also means that we can bend the hose with much tighter radius without causing leaking issues. 
  • duotight – 8mm (5/16”) Female x 8mm (5/16”) Female Push In Joiner - KegLand
duotight – 8mm (5/16”) Female x 8mm (5/16”) Female Push In Joiner

duotight – 8mm (5/16”) Female x 8mm (5/16”) Female Push In Joiner

KL02370

$3.95
In stock
Volume pricing
1+ $3.95/ea
10+ $1.70/ea

This straight joiner is designed to securely connect two 8mm (5/8") outer diameter (OD) hoses end-to-end, or to attach an 8mm OD hose to a rigid, 8mm duotight-compatible post. It provides a reliable, leak-free connection suitable for a variety of gas and liquid tubing setups, ensuring smooth, uninterrupted flow through your system.

Applications & Compatibility

  • Hose to Hose: Join two 8mm OD hoses together.
  • Hose to Barb: Join an 8mm barb to an 8mm OD hose - useful for certain pressure gauges and Quick Swivel barbs
  • Barb to Barb: Why not join a Quick Swivel barb to a pressure gauge?

8mm Tubing Compatibility

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

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.

Product Downloads

Generation 2 duotight Design Revision

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Overall rating: 5.0 / 5 from 14 reviews.

AI Generated Review Summary

Summary topics

Review topics: ["quality","service"].

Review highlights

Reviews

duotight – 8mm (5/16”)

"These are great fittings, easy to connect and disconnect. The double O-ring gives a great seal."

— Wayne D. (5/5)

Picked up from store, but

"Picked up from store, but the quality and fit were very good and have had no leaks"

— Kelvan T. (5/5)

Excellent

"Great product"

— Steve B. (5/5)

Excellent

"Great company to do business with."

— Nicholas E. (5/5)

good

"good"

— Nebojsa R. (5/5)

Just Works

"The dual EPDM O-rings give a rock-solid, airtight seal on 8mm tubing without needing clamps. The build quality is excellent, holding high pressure perfectly with zero leaks while remaining incredibly easy to pop off when needed. It is a simple, high-quality fitting that just works."

— Ryan A. (5/5)

Great service

"Love Kegland great service and pricing"

— Brian D. (5/5)

Homebrew HQ

"Great quality fixings, our customers love em"

— Rick R. (5/5)

excellent product

"excellent product"

— John R. (5/5)

Simple and easy to use.

"Simple and easy to use. Legends!!!"

— Fionn O. (5/5)

Q&A