Duotight Ball Lock QD Gas In | Quick Disconnect Gas In Push-In Fitting

Duotight Ball Lock QD Gas In | Quick Disconnect Gas In Push-In Fitting

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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
Why did you choose this?
MoreFlavor Store
Spare - plus 20% off Promotion
David Lange on Mar 4, 2023
Changing gas side setup
Don C on Feb 15, 2023
Spare - plus 20% off Promotion
David Lange on Mar 4, 2023
i love all duotight products
Edward E on Feb 23, 2023
Changing gas side setup
Don C on Feb 15, 2023
EZ to clean
Kevin Davis on Feb 10, 2023
swapping out older versions and wanted the duotight adapters
John T on Jan 31, 2023
low profile
Monty S on Jan 26, 2023
Switching ot
Dale S on Jan 24, 2023
Michael R on Jan 23, 2023
Why not at this point
Greg M on Jan 18, 2023
They are wonderful and worth every penny.
Jonathan Wessman on Jan 15, 2023
I understand it is the best
len t on Jan 11, 2023
To easily differentiate ball locks
James M on Jan 10, 2023
gas transfer
Calvin M on Jan 10, 2023
Great reviews
Toby S on Jan 5, 2023
MICHAEL G P on Dec 20, 2022
Converting to push in fittings
Carl S on Dec 16, 2022
Same as above.
Alec B on Dec 16, 2022
more compact
aaron w on Dec 15, 2022
To adapt my CO2 supply for use with DuoTight lines.
Tyler Crawford on Dec 13, 2022
To serve my home brew on my kegerator.
Don on Dec 10, 2022
To convert to John Guest fittings
Elmer N on Dec 6, 2022
Converting from.crimp on fittings to push in fittings.
Carl S on Dec 2, 2022
To attach pressure gauge
Randy S on Nov 30, 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
Friend recommended duotight as way to go
Bill Paris on Nov 8, 2022
smaller form factor, saw review on 'the homebrew challenge' YT channel
Jeff H on Nov 2, 2022
Malcolm C on Oct 29, 2022
Malcolm C on Oct 29, 2022
just trying to see quality
Travis Nissen on Oct 25, 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
Simple, easy to use and clean, and reliable.
Clifford W on Oct 14, 2022
To set up my kegging solution
Steven Simpkins on Oct 12, 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 T on Sep 3, 2022
To get ligher CO2 lines in my fridge. My stainless ones were pulling my sticky cable ties off the wall
DrBubbles 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
i love all duotight products
Edward E on Feb 23, 2023
EZ to clean
Kevin Davis on Feb 10, 2023
Are these like the red and yellow carb caps in that they are not actually post specific? Is the color just for reference? I wanted a ball lock QD that will work with either gas or liquid for cleaning.
Carl A Kessler III on Mar 18, 2024

4.1 / 5.0
18 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 4 out of 5
Super easy hose attachment!
Would have been 5 stars if the fit on the post wasn't so ridiculously tight.
March 12, 2023
1 year ago
Rated 3 out of 5
Arrived With Most of the Caps Stuck
The cap is badly designed. Most of my disconnects arrived with caps that were screwed on too tightly, and I had to use tools to get them off. Steel tools damaged the caps.

I suggested they make the caps long so people can get leverage with their fingers, and they said they were considering it.

Kegland has a machine that screws the caps on. This is why they arrive stuck.
March 12, 2023
1 year ago
Response from MoreFlavor
So sorry to hear about your experience. Thank you so much for your feedback. We really appreciate the honesty and value great feedback like this as it helps us improve our products. We try very hard to create the best experience for our customers and provide quality products. For any questions or concerns you can reach out to our customer service team by scrolling to the bottom, right-side of our web page and following the appropriate link. We are here to help. Cheers!
March 24, 2023
Zack Marin
Rated 5 out of 5
Red Gas In QD
I prefer these over the "standard" gray fittings. I especially like that the outlet is at 90-degrees from the keg post instead of at the angle that they come out on the plastic ones.

I do wish though that there was a model that had a 1/4-inch flare fitting instead of the DuoTight. This would help facilitate taking them off if they should need to be cleaned or maintained.
February 27, 2023
1 year ago
Rated 2 out of 5
Not as tough as advertised
The internal "plunger" bent after only three uses.

Would not recommend
February 22, 2023
1 year ago
Response from MoreFlavor
We are so sorry to hear about your bad experience with your order. You are still within our return policy and warranty window for a damaged product. Please go to our website, scroll to the bottom of the page, and use the Return an Item form and we will set you up. Cheers!
February 23, 2023
Rated 5 out of 5
Duotight is awesome
These fittings fit tight and no leaks. Allows more kegerator versitility.
February 13, 2023
1 year ago
Rated 3 out of 5
These seem to be a half mm too small or something. Don't get me wrong, they work well, but they are very hard to get on and off compared to other options. I use Torpedo kegs
January 12, 2023
1 year ago
Rated 2 out of 5
Nice but hard to use
these are nice and small factor ball lock but sometimes they are hard to disconnect from the keg post.
December 19, 2022
1 year ago
Rated 5 out of 5
Worth it
Switching to Duotight was a great call
User submitted image
Added Dec 12, 2022
December 12, 2022
1 year ago
Rated 1 out of 5
Bought 4 and 2 of them leaked so bad they drained an entire CO2 tank. Found the leaks on the top cap seal by dunking it under water. I don’t understand how these could possibly seal without o-ring or some kind of a seal ring.
November 20, 2022
1 year ago
Rated 5 out of 5
Does its Intended Job Just Fine
These disconnects provide a tight, leak-free, connection. Being able to remove the hose easily for different configurations is also a nice feature. I still use the old-school pin-lock (Coke) disconnects and I've noticed a few things about these disconnects as compared to the pin-locks. First, these are a REALLY tight fit. It'll take some pressure to engage these and pushing on fittings attached to plastic vessels should be done with care. Also, it's nearly impossible for me to engage the inner post to flush with sanitizer. I have to use my pointer finger and the post is tight enough that it gets uncomfortable fast. Much easier (and I can use my thumb) with the pin-locks. I'm sure I'll get used to it and/or find better ways to flush these with sanitizer. Two thumbs up!
November 19, 2022
1 year ago