DIY Serving Cooler for Mini-Kegs

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Gkeg-v2.0-F.jpg
Version 2, which serves two mini-kegs at the same time
No, this is not an article about drinking beer while driving around (very bad idea). This is an article about how to keep homebrew chilled and carbonated in mini-kegs for tail-gating, BBQs and camping trips. It is about having portable homebrew that does not require hauling bottles that may have different levels of carbonation, the added costs of labels, carriers and other nice things we like to do to personalize our home made craft beers not to mention the removal of the empties when done.
This story starts 22 years ago when a group of friends celebrated the 10 year anniversary of their college graduation camping trip. It was 1994 the same year as the Woodstock II. When we told family and friends we were going to NY to camp out and listen to music, drink beer and hang with friends they all thought we were going to Woodstock II. This became the running joke and when the only beer we could afford and find was Budweiser we dubbed the event "Budstock". That name has stuck for all these years. Many of us brewed our own beer thanks to Charlie Papazian’s Joy of Homebrew (relax, don’t worry and have a homebrew). Over the years as our skills in brewing got better more homebrew came to Budstock. This also started a friendly competition of one-upmanship. When all the little inconsistencies of bottled beer became a pain, we eventually we bought 5 gal corny kegs and it was grand. But the bulk and setup/breakdown made this cumbersome. This is where the story of the GKeg begins. I wanted to have kegged beer for Budstock in a small convenient dispenser that not only kept the beer at proper temp but also proper carbonation all without the use of electricity. Being an engineer by trade and a DIYer (like many on this forum) I had a homebrew and began to think of how to accomplish this. I figured a cooler was the best starting point the next would be how to get a keg into a cooler because a 5gal corny is just too big and heavy.
Fortunately I had 2 SS 2.5gal mini-kegs that I had been using in for backyard events. It had a CO2 injector and a cobra tap. You put this in a bucket of ice and water and you are good to go. But this was for Budstock and there is always a friendly competition in everything we do from cooking to DIY projects. Also the carbonation was inconsistent because you had to randomly decide when to inject more CO2 and the cobra tap reminded me of the Beer Balls of the 90s. This was homebrew and it deserved more than this treatment. So now I had a suitable small vessel and needed an insulator cooler to house it. Amazingly enough those 5 gal orange igloo coolers are perfect for this and the mini keg slides in with room for ice around the keg. Once filled the lid screws back on and keeps everything tidy. Next up on the hit list was a viable consistent source of CO2.
components-F.jpg
the main components for serving from mini-kegs on the go
This was easily solved by a Leland Mini CO2 Regulator that uses 45 gram disposable CO2 cartridges. This was more than enough gas to push beer thru several minis. I mounted the regulator on the outside of the cooler and ran a gas line with ball lock to the inside. The unfortunate part is once the CO2 cartridge was pierced it could not be sealed. This was not an issue during the 4 days of Budstock but I feared it would eventually leak out in the months it would sit Dispensing the beer deserved more than a cobra tap- it needed a spigot. Fortunately like most on this forum I have spare parts all over and I had a spigot for a kegerator available. Unfortunately due to the lack of room in the GKeg once the mini keg was in, I needed a 90 degree down spout spigot with a short shank for this task. A shank for a beer tower worked just fine.

Building the Serving Vessel for Mini-Kegs


layout for the mini-keg serving device
Here is a drawing I made of the final construction. This design had an external bottle of Co2 not the mini regulator. Because I wanted this as compact as possible and in a singular unit I opted for the mounted mini regulator. I took two different brews with me to Budstock and won a Budstock Innovation Award for that year. This is coveted honor that does not get awarded every year. Maybe in a future article I will go into other Budstock Innovations and the gastronomical competitions we have. I can guarantee that what is done in a wilderness site at Budstock far exceeds what many think is camping.

Parts list for the GKeg


  • 5 gallon Igloo type cooler
  • 2.5 gallon SS mini corny keg
  • Leland mini regulator with disposable cartridge
  • Tower type beer shank and spigot
  • Liquid and gas beer line connectors
  • Beer line
The spout on the bottom of the GKeg is a handy way to remove the excess water from the melted ice which helps when changing kegs out.
Alas I do not have a picture of the final GKeg as it was cannibalized to create the GKeg v2.0 which is a wheeled version with a handle that holds 2 kegs and sports a nice chrome 2 tap beer tower. This was bought to Budstock and earned another Budstock Innovation Award. I may do an article on that beauty at a later date. Like most of you DIYers I re-purposed the Igloo cooler and it now serves as a Mash Tun in my brew system.
diy-minikeg-f.jpg
 
Nice. Now, your next innovation ought to be a redesign of the event name. Any reference to the Mega Corp that shall not be spoken detracts from the spirit of small scale innovation, imho.
 
This event and name have been around since 1994. As much as I would like to distance it from the fizzy water company that shall go nameless I just cant. So I say its a tribute to the UK Music festival of the same name that has been around for over 25 years as well. Budstock Festival by the Sea founder Joe Holroyd said "We were into the film Woodstock and wanted to recreate that vibe in Budleigh"
http://www.exeterexpressandecho.co.uk/seaside-music-festival-marks-20-years-exciting-mix-bands/story-11789686-detail/story.html
Budstock USA is also a music event in so much that a lot of prerecorded live music (all legally acquired) is played in the base camp and on the water. Its about longtime friends enjoying beer, food and music
And now there is a pro-marijuana Budstock Festival in Orillia CA- Budstock two Dayz of haze
Though I prefer not to associate our event with that. As professional engineers we dont need that kind of attention
So I feel less association with the fizzy water company and am taking back Budstock as a reference to the spirit of friends, beer, food and music that both sides of the pond have been enjoying for a quarter of a century
 
Cool device! (Pun intended). I built something a couple of years ago a bit different. I swapped Posts on the keg so the long dip tube was the GAS and the Short dip tube was the BEER. Then I flipped the keg upside down in a 10 gallon cooler (5 gallon keg) and ran the gas line out to a CO2 regulator and the Beer line to a faucet that was mounted in place of the drain in the bottom of the cooler.
It worked well, but was a PITA to set up as I wanted ALL the beer line to be submerged in ice water. This meant having to dink around with wrapping the lines around the keg and there is not much room to play in there with the keg in the way. A box cooler would have been much easier.
The purpose was to get all the beer and ice water in contact to eliminate warm spots in the line and not have to use a Cold Plate or Jockey Box. It was self contained. I got the idea from seeing a "keg tree" at the NHC in Grand Rapids a couple of years ago.
If I had to do it all over again I'd probably just try to use a QD-mounted faucet and not worry so much about the warm spots. Or maybe do a rectangular cooler as you did. Eliminates a lot of the cost of building a small, personal jockey box.
 
If you look at the GKeg v2.0 picture at the top of the page this is what I found to be the best solution space and transport wise. The tower easily comes off, the handle pops up and the cooler is wheeled. Inside is a small 2.5lb CO2 cylinder and I line it with those frozen blu gels so there is room and it keeps the beer very cold. Camping I also fill it up with ice and we went thru 2 mini kegs (5 gal) with it all being served cold and at proper carbonation. I wished I had more mini kegs because this would have served great beer all week.
I had to reinforce the underside of lid with 1/4" clear plastic and some PVC spacers because the lid is hollow. It worked out very well and for anyone attempting this I highly suggest reinforcing the cooler at these stress points. I also created a spacer to hold the CO2 tank as the angles of the interior of the cooler did not make a tight attachment. If more are interested i will do a DIY of the GKeg v2.0
 
I would be interested in seeing a DIY for the GKeg v2.0. I enjoyed reading about your progression from the original idea to the improved model(s).
 
Thanks- it was a lot of fun to think up and create
A DIY on that one will be more informative since It is available for pictures of all angles (unlike the v1.0 which was parted out for other projects). Its size allows me to be confident about bringing properly carbonated home brew to BBQs and events in an easy to transport system. Plus its pretty cool to have it "on tap" and to have two types of brews available.
 
I like it!
I have been using a similar cooler to house a 5 gallon corny, which sticks out the top, obviously, but then using a foam pipe insulation tube as an insulating seal around the keg (like a giant O-ring between the outer wall of the keg and the inner wall of the cooler). The top of the keg is un-insulated with that setup, but as long as the bottom stays in ice, it's fine.
My question is this: In your setup, why run an external gas line? If you are using the mini-regulator and 45 g CO2 cartridge, why not just lay the regulator/cartridge on top of the keg inside the cooler? Is there not enough space? are you trying to keep it dry? Just curious.
-John
 
In this configuration (Gkeg v1.0) there was just no room inside the igloo cooler. I had to coil up some of the hose and the ball locks barely fit with the lid screwed on. If I could fit it inside and it only fit laying down I would be afraid if I tipped the CO2 cartridge I might get liquid instead of gas. Outside mounting was the only option
The Gkeg v2.0 has the gas inside and strapped upright so this is not an issue. With the tower off it you cannot tell it is not a regular cooler (well there are some SS screw heads showing)
But this is why we iterate and improve. The v1.0 taught me a lot of lessons and what I wanted to do for v2.0. It took over a year to find the perfect rectangle cooler (right height and could accommodate 2 mini kegs). And of course listening to all you people with comments and great ideas. I find a lot of great information on these forums and everyone is so nice and friendly. I am glad I can share in the collaborative process that abounds in these forums. Thank you all for the comments
 
Sure
I think its an Igloo Island Breeze Roller cooler 64qt.
I got it at BigLots but I have seen it at Walmart as well. Make sure its the roller cooler or you wont get the wheels or telescoping handle.
Biglots has it on their site for $37
http://www.biglots.com/product/64-quart-island-breeze-rolling-cooler/p810293240?zcp=PD_PLA_go_Outdoor_Tailgating_Coolers_810293240&adpos=1o5&creative=148610018370&device=c&matchtype=&network=g&gclid=CLDBjZ6k3tECFQ5YDQodTi4B8Q
 
That's awesome! I got an igloo cooler for a skinny one gallon keg I had and the faucet stuck out the top but there wasn't much room to cram ice in there. I use it as a mini mash tun for pilot batches now. Oh well..
 
We adapt and overcome and like legos we take apart and reassemble into what we need for the moment!
I just got some new brew equipment and have been DIYing the crap outta my stuff!
I cant afford a MoreBeer Tippy Dump system but I can take the elements of it I like and scale down to my brew home brewery
 
No- on the V1.0 using the 5gal igloo cooler I simply used a beer shank long enough to fit through and have a 90 degree bend for the tubing. I used 2 heavy rubber washers inside and out and got a very good seal with no distortion. i originally thought I would have issues being the surface was curved but in the end it was not a problem at all
 
On our annual Florida beach vacations, I always bring a 5 gal corny of a brew made just for the beach. I cut four panels out of a 4 x 8 pink insulation board (from HD or Lowes) and make a rectangular box high enough to completely put the corny into, with two more pink-panel cuts for a bottom and top. All these get duct taped together. I then put a corny into a plastic trash bag, and then the bagged corny the box. Now I spray tow cans of expanding foam insulation into the box, about 1/2 way from the bottom. Let the foam dry, and lift the keg out of the plastic bag. You now have a way to transport cold beer, and add ice as needed to the top 1/2. This can be reused if treated properly.
When set up for use, I have a picnick tap and a mini Co2 charger.
You can buy decorative duct tape if you want a better look.
4 x 8 pink foam board - $14.00
2 cans expanding foam - $10.00
Ductape - $3.00
 
that's a very cool idea. How fragile is it? I would think with the expanding foam it would be pretty solid if it adheres to the pink board albeit heavy as its 5 gal not 2.5 plus ice
do you transport it via hand truck or can you carry it?
can you post a pic?
thanks
gman
 
I just finished mine. I love it!
Used a 5 Gal Igloo from Lowes. For CO2, I'm using a mini regulator that uses 74 gram CO2 cartridges and a short (3") hose to the gas in disconnect. The regulator and cartridge fit inside and rest comfortably on top of my 2.5 gal ball lock keg. This thing is awesome!
Thanks for the idea!
 
glad I could help!
It really fun to take to BBQs and such.
No more bottles and it lets the Mad Scientist in you comes out Then if the beer is equally good- double whammy LOL!
are the 74 gram CO2 the paintball canisters?
For the v2.0 I got a 2.5lb refillable CO2 tank which is more than enough gas for many many mini kegs
 
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