Duotight Ball Lock Quick Disconnect (QD) - Gas In

Duotight Ball Lock Quick Disconnect (QD) - Gas In

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The humble plastic ball lock disconnect has been around a long time and is used by countless homebrewers around the world.  Despite the extensive use they have seen little to no innovation for decades and KegLand wanted to change this. Enter the Duotight Ball Lock QD. The integrated Duotight design means you can connect your beer and gas line directly, easily and reliably with no need for additional fittings or clamps. It is a robust and super compact design that is incredibly easy to assemble and disassemble, making cleaning and sanitizing an absolute breeze!

Made from highly chemical resistant materials with stainless springs and ball bearings (no cheap ABS plastics here) this baby is extremely resistant to commonly used chemicals such as phosphoric based sanitizers and caustics. The incredibly small form factor allows for easy stacking of kegs. The new cap design ensures a pressure seal with just hand tightening and it can be completely taken apart for cleaning with no tools required.

Duotight Ball Lock QDs are offered in three sizes that correspond to the outer diameters seen on our line of EVABarrier Draft Tubing. 

  • 6.35 mm OD – features a very tight 3 mm ID that requires only 3.2 ft of length for adequate flow resistance. This is the ideal size for mobile draft or if you want to keep your kegerator as tidy as possible.
  • 8 mm OD – the most common OD size of EVABarrier tubing. This size comes in two IDs (4 mm & 5 mm) and pairs up with the lion's share of Duotight fittings and accessories. 4 mm ID is our most recommended size for beverage lines, requiring 5-6 ft. lengths. 5 mm ID is commonly used as gas line or when 10-12 ft. beverage lines are required.
  • 9.5 mm OD – suitable for gas lines or long draw beverage lines. At 6.3 mm ID, this size is ideal for beverage lines that will be 20 ft. or longer in length.

Duotight Push-to-Connect
These Duotight ball lock disconnects already have the Duotight fitting built into the ball lock disconnect. No need for additional threaded fittings. Simply push the beer/gas line in and you are done!

The world's most compact ball lock disconnect ever manufactured. This new compact form factor is great for tight spaces or fridges where you want to pack as many kegs in as possible. This is one of the only ball lock disconnects that allows standard ball lock kegs to be double stacked while still connected to beer and gas lines.

Overmolded Poppet
The overmolded poppet design means you can couple and disconnect this ball lock QD under extreme pressures of up to 150 psi (higher than most kegs working pressure) and will never have issues with the o-ring blowing out.

Tool-less Disassembly
Other ball lock disconnects require a tool such as a flat head screw driver or spanner to take them apart for cleaning. The new caps on these allow for easy disassembly by hand, making these easier to break down for cleaning. It's literally never been easier to remove hop particles from your ball lock disconnects.

Extreme Chemical Resistance
No cheap ABS plastic or nitrile seals. This ball lock disconnect is made from stainless spring and ball bearings, with an engineering polyketone resin body, EPDM and PP/EPDM overmolded poppet. This makes the quick disconnect resistant to extreme chemicals such as phosphoric and acetic acid, caustic soda, peroxide and many other acid or base chemicals which are commonly used in homebrewing.

This ball lock disconnect is more robust than any other plastic ball lock disconnect ever manufactured due to the use of new engineering plastics. Don't be fooled by the small form factor — these bad boys are tough!

High Flow
The internal design of these allows for faster flow meaning you can slightly quicker transfers when compared to other plastic ball lock disconnects.


  • Ball Lock Quick Disconnect - Gas In
  • Direct connect EVABarrier tubing
  • Compact design won't interfere with keg stacking
  • Made from highly chemical resistant materials
  • Disassemble by hand for quick and easy cleaning
  • Three sizes available:
    • 6.35 mm (KL24242)
    • 8 mm (KL20756)
    • 9.5 mm (KL20770)


Community Q&A

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Browse 1 question Browse 1 question and 17 answers
Why did you choose this?
MoreFlavor Store
something new
David P on Oct 3, 2022
need more
Daryl on Sep 3, 2022
something new
David P on Oct 3, 2022
Husband asked for his 39th b-day gift
Kaila S on Sep 22, 2022
need more
Daryl on Sep 3, 2022
To get ligher CO2 lines in my fridge. My stainless ones were pulling my sticky cable ties off the wall
Andrew MacPhee on Aug 30, 2022
I like the simple design
Scott on Aug 27, 2022
low profile
John R on Aug 23, 2022
New QD
Santiago W on Jul 30, 2022
to attach gas line to keg
Trevor S on Jul 19, 2022
My current gas QD are barbed
Derek D on Jul 18, 2022
Skips the necessity of certain pieces.
Merlinus Monroe on Jul 8, 2022
need to connect to kegs
Sam W F on Jul 8, 2022
Using 8mm hose means less hose in the kegerator.
William C on Jun 30, 2022
Very impressed with duotight fittings (Kegland) and setting up a 4th tap on my kegerator.
Brad Braddy on Jun 27, 2022
Bought some of these already, love them!
Michael B on Jun 27, 2022
I want to make connects easier and reduce leaks. Hoping this works.
Roy C on Jun 27, 2022
rebuilding my kegerator and a friend uses this and is very happy.
Scott on Jun 20, 2022
need to connect CO2 lines
William K on Jun 14, 2022
Husband asked for his 39th b-day gift
Kaila S on Sep 22, 2022
To get ligher CO2 lines in my fridge. My stainless ones were pulling my sticky cable ties off the wall
Andrew MacPhee on Aug 30, 2022

4.8 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Works great
I used to have a problem with other ball locks, and the gasket popping out often. Not a problem with this one due to the different construction. I also feel like it's easier to unlock
August 12, 2022
2 months ago
Rated 5 out of 5
Duotight Ball Lock Quick Disconnect (QD) - Gas In
It works and doesn't appear to leak
July 31, 2022
2 months ago
Rated 5 out of 5
No leaks, easy to disconnect tubing, what more do you want?
July 18, 2022
3 months ago
Rated 4 out of 5
First Trio
This and the liquid quick disconnect, completes the Eva/
Duo keezer build. From the regulator to the faucet shank is Kegland Duotight and Evabarrier in my 3 tap keezer draft system for home brewed beer. Been using the lines and fittings for a few years, with CMB disconnects in the middle. Still won’t switch back to anything else
User submitted image
Added Jul 2, 2022
July 2, 2022
3 months ago