Duotight Ball Lock Quick Disconnect (QD) Beverage Out

Duotight Ball Lock Quick Disconnect (QD) Beverage Out

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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 - Bev Out
  • Direct connect EVABarrier tubing
  • Compact design won't interfere with keg stacking
  • Made from highly chemical resistant materials
  • Dissamble by hand for quick and easy cleaning
  • Three sizes available:
    • 6.35 mm (KL24235)
    • 8 mm (KL20749)
    • 9.5 mm (KL20763)



Community Q&A

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Browse 3 questions Browse 3 questions and 42 answers
Why did you choose this?
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Great design compared to my current QDs
Richard J DePas on Nov 16, 2022
ease of use
Nobody Important on Nov 12, 2022
Great design compared to my current QDs
Richard J DePas on Nov 16, 2022
Marcus J Ronney on Nov 15, 2022
ease of use
Nobody Important on Nov 12, 2022
I'm changing my beer lines over to duotight/eva
Dave B on Nov 10, 2022
Friend recommended duotight as way to go
Bill P on Nov 8, 2022
smaller form factor, saw review on 'the homebrew challenge' YT channel
Jeff H on Nov 2, 2022
Assembling a portable keg system.
Merlinus Monroe on Nov 2, 2022
works great fits great
james williams on Nov 1, 2022
Trying something new. I'm all for the quick connect, now I can have a quick line connect as well.
John M on Nov 1, 2022
Malcolm C on Oct 29, 2022
Ease of use
Jeffrey Z on Oct 24, 2022
Lower profile, believe will have less chance of getting broken.
Eric C on Oct 20, 2022
I like to be an early adopter
Matthew C on Oct 19, 2022
Simple connection
TYSON GRAAFF on Oct 12, 2022
Need it
richard A on Oct 7, 2022
something new
David P on Oct 3, 2022
Wanting to finish converting my whole keg system to Duotight fittings and tubing. Much cleaner and easily serviced product
Howie L on Sep 20, 2022
Changing my keg system to use only DuoTight and EVABarrier
Lloyd M on Sep 20, 2022
low profile
John R on Aug 23, 2022
Lower profile to fit inside a cooler hopefully
Robert G on Aug 19, 2022
wanted a duotight QD for my continuous carbonating lid
Jake M on Aug 18, 2022
Reworking my refrigerator for Duotight Fittings
Steven Johnson on Aug 5, 2022
Works with EVA tubing. Looking forward to an easier to take apart product than a traditional ball lock.
James D on Aug 5, 2022
New QD
Santiago W on Jul 30, 2022
New direct connection with EVA tubing
Gerald H on Jul 29, 2022
To replace "old school" ball locks that require an MFL to Duotight - fewer parts is a win in my book
Ted Webb on Jul 26, 2022
Easy connection
DON SARGENT on Jul 21, 2022
For keg-keg xfer line.
Lloyd M on Jul 19, 2022
Switch to duotight for Counter Pressure Bottle Filler
Joseph Pitz on Jul 14, 2022
See above.
David J on Jul 11, 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
To work with 8mm draft tubing
Charles R. on Jun 21, 2022
rebuilding my kegerator and a friend uses this and is very happy.
Scott on Jun 20, 2022
I like the fact that I can remove one fitting and an opportunity for leak to happen.
pierre m on Jun 20, 2022
need to get beer out
William K on Jun 14, 2022
Forgot to purchase with the kegerator
Spencer g on Jun 10, 2022
Marcus J Ronney on Nov 15, 2022
I'm changing my beer lines over to duotight/eva
Dave B on Nov 10, 2022
How do you remove the tubing? These QDs seem harder to remove than the push in fittings.
Dan on Sep 29, 2022
BEST ANSWER: Find a tool -- i end up using a small crescent wrench with a gap set to the diameter of the tube, but there may be a tool made for the purpose -- anything you can use to depress the little collar that grasps the tube -- press the collar in against the housing -- while using the other hand to pull the tube out.
What's the recommendation to convert a "traditional" kegging setup to Duo Tight fittings? Mainly looking for recommendation on hose diameter & hook up to TapRite regulator barbs?
Lutz Engmann on Aug 8, 2022
BEST ANSWER: I use 8mm and everything works just fine including connecting to my TapRight regulator.

4.8 / 5.0
5 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Ready to use and works.
November 15, 2022
3 weeks ago
Rated 5 out of 5
Very high quality, easy to clean, and they never leak
I've been using these for some time now, and they've proven quite reliable and easy to clean. They've never leaked and always form a perfect seal. An added touch is the marking indicating how far your tubing will need to be inserted to properly engage both seals (see Tip below). I find these QDs to be particularly easy to disassemble for cleaning and I don't have to worry about losing parts. And don't underestimate the color: gold for beer makes a whole lot more sense! :D

Tip: Use a permanent marker to place a little line on your tubing so you'll always be guaranteed that your tubing is inserted completely as it's pretty easy to only push it in far enough for only 1 of the DuoTight seals to engage.
October 18, 2022
4 months ago
Rated 5 out of 5
Duotight Ball Lock Quick Disconnect (QD) Beverage Out
They are a little difficult to remove but while installed, they work as expected.
August 30, 2022
3 months ago
Rated 4 out of 5
Cut straight
All but one worked great. Make sure that you cut the beer tube evenly
July 20, 2022
5 months ago
Rated 5 out of 5
Only one beer in so far. Super easy to connect tubing and holds seal perfectly.
July 18, 2022
5 months ago