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Draft Brewer® Cannonball® 1.75 Gallon Mini Keg System


SKU# K517

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​Small and mighty. Introducing the Draft Brewer® Cannonball® —the first ball-lock mini keg system that packs the power of a taproom into a portable, compact 1.75 gallon barrel.

From tailgating to camping, a picnic or a party, the Cannonball®; is the party-powering ammunition you need to have a good time, anytime and anywhere.

Complete Draft Brewer® Cannonball® Mini Keg System Instructions

Availability: In stock

Draft Brewer® Cannonball® Mini Keg System

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  • Draft Brewer® Cannonball® Mini Keg System
  • Draft Brewer® Cannonball® Mini Keg
Product Details
Small and mighty. Introducing the Draft Brewer® Cannonball® —the first ball-lock mini keg system that packs the power of a taproom into a portable, compact 1.75 gallon barrel.

Artillery for the small batch brewer. Carbonate homebrew in minutes, not weeks. Real-time carbonation control. A quick pressure adjustment and you’re instantly pouring perfect pints.

The Cannonball® blasts 3- and 5-gallon kegs out of the water. Barely bigger than a milk jug, it slides straight onto a fridge shelf, pops in a cooler or drops right into your trunk. From tailgating to camping, a picnic or a party, the Cannonball® is the party-powering ammunition you need to have a good time, anytime and anywhere.

Cannonball® kegs are easily stackable once ball-lock disconnects have been attached.

Kit Includes:
  • Cannonball® 1.75 Gallon Mini keg
  • CO2PO® Dual Gauge CO2 Regulator - Patent Pending
  • Ball Lock Gas & Beer Lines
  • Nylon Washers (4)
  • Complete Instructions

Keg Dimensions
Base Diameter (diameter of body): 9"
Height of Body (not including handles): 9.375"
Height with Handles: 10.75"
Base Inset/Top of handle diameter: 8.5" 

Note: Does not include a CO2 Tank
Additional Information
4.5 / 5.0
37 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Great product fast shipping!
Love It! Have not used it yet but getting ready to. I will be brewing a 2.5 gallon blonde Ale this weekend and will try it out after it comes out of the Fermenter!
April 6, 2018
1 month ago
Great system for an apartment dweller. Amazing service from Northern Brewer!
Do you want to get into kegging but you live in a tiny apartment with no space for a full 5 gallon keg set up? This is your solution! I got this system because I got tired of bottling and loved the idea of having draft beer at home. I now kegged two separate batches of beer and cider and its absolutely awesome. Construction quality is very high, and it looks great. Most of all, the keg is a perfect size and fits perfectly on the bottom shelf of my small fridge. I’m not thinking of buying another one of those. It allows you to keg about 2 gallons, and I usually bottle about 1 gallon to give out to friends and keep 2 gallons in secondary and fill up the keg again once I run out.Also Northern Brewer provides great support for their products. Few weeks in something got screwed up with the regulator gauge (maybe because of my fault). It was still fully functional but it was a bit hard to read the PSI. Norther Brewer sent me a new one right away. Fully recommend!
March 28, 2018
1 month ago
I love these.
Just bought my third one, probably get a fourth as four of these will fit on the bottom shelf of my standard size fridge. They just need about 11"of height to fit in there. A nice option for those who want to keg but aren't ready to build a kegerator. Mine share the fridge with the food. I just charge them as needed, CO2 tank is next to fridge, I reach in with hose for a quick charge when the beer/cider slows a bit, don't even have to take them out. I keep some silicone oil handy for all the O-rings, keeps the seal tight and helps the fittings come on and off easy. The handles are stronger than they look, I shake the hell out of them to speed up carbonation they feel solid. Cheers!
March 7, 2018
4 months ago
The Cannonball Rocks!
Absolutely love it! Great for a roll around cooler set up wit a 5 pound CO2 tank. Highly recommended!
User submitted image
Added Mar 4, 2018
March 4, 2018
2 months ago
Will work very nicely.
I really don't have the room for a Kegerator so I've been bottling beer which is not my favorite thing to do. Not a big deal, just something that I'm not going to miss. This thing and the tank both fit on the top shelf of my fridge and there is still plenty of room for other things as well. A local fire and safety place filled my co2 tank for 12 bucks. Money saved on priming sugar will pay for that. So far I like it. If it holds up I will continue to like it.
January 27, 2018
3 months ago
Lots of issue with the product
Homebrew is so much fun, but the keg is far below expectation.
1. Faucet is extremely weak, which cannot take any normal beer pressure and leaks all the time.
2. Come with long tube at ‘in’ side?and short tube at ‘out’ side. The long tube won't fit the 'out' side.
3. Pressure gauge not accurate at all. The pressure shown on the gauge is way larger than the real value.
4. Metal crude on the surface of the keg at the connection between handle and keg body. I was not lucky at all.
January 4, 2018
5 months ago
Great little keg for small frig and To Go!
Met my expectations. Easy to store, transfer and refill. Did not really need the regulator that is part of kit since Iâ??m simply filling off a larger keg and using a small 9oz co2 cartridge to increase pressure as brew descends. Still a nice kit that I can also adjust the recipe in the smaller keg if desired.
December 27, 2017
4 months ago
Great System!!
The Cream Soda that we use this for is carbonated and sweet.
November 27, 2017
6 months ago
Small keg system works great.
The keg, valve, tubing, etc... are well made and are holding up great. I would have given it a five-star rating if it came with 2 gallons of holding compacity and extra seal kit.
July 26, 2017
over 2 years ago
Mini Keg System
Nice compact size. Fits nicely in the fridg! Seems to be sturdy stainless steel construction.
April 15, 2017
1 year ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 36 questions Browse 36 questions and 82 answers
So do you have keep a keg in the fridge while it carbs up? Or can you let it sit out at room temp until it's ready then put it in a fridge? I've never kegged yet so I'm not sure. Also do you have to have the co2 tank attached at all times while it carbs and for dispensing or is there residual pressure to last a little while without it being connected?
R T on Sep 5, 2016
BEST ANSWER: Carbonation is all about partial pressures. The pressure in the tank is higher than that in the keg. You can carb while its at room temperature. But! It will take a long time. Not as long for 1.75 gallons as for 5 or more, of course. Also, it will take longer the less full the keg is, the warmer each the tank and the keg are, and the closer in temperature they are to each other. The CO2 will infuse into the beer easier/faster at colder temperatures. Note, if you put the CO2 tank into the fridge with the keg, it will slow the carbonation process. Also, the CO2 will remain in the beer longer/easier with less free headspace (the fuller the keg) or as long as the pressure in the headspace is greater to or equal to the desired CO2 in the beer.

You can dispense from the keg without the CO2 hook-up, but then you're using the carbonation in the beer to force the beer out; that is to say, like a bottle of soda, when you first open it to the outside air (bottling, tapping into a glass, serving, etc) the carbonation wants to leave the beer because there is less partial pressure outside and in the head space in the keg (as the keg empties. The CO2 leaves into the head space AND will create (IMHO) an undesirable amount of head. If it's not hooked up to the CO2 tank, you're losing carbonation as you empty the keg. Use a little bit (4-12 psi setting from the keg) to dispense.

So, shorthand:
Cold full keg (Google Force Carnonation Chart) and room temperature CO2 tank for fastest and most controlled force carbonation.

Reduce CO2 tank pressure for dispensing (Google: serving PSI from (x) gal. keg).

For the science-y geeky types out there:
If you don't empty the keg, adjust the PSI back up a little to ensure you're adding a bit of CO2 back into the keg for the loss of pressure into the greater head space remaining in the keg - potentially negligible depending on the beer and how carbed it is and how much beer you've removed. This can be a difficult thing to calculate if you're not up for it.

Science is your friend, love your Google searches! Or you can wing it. And as long as your yeast were good and your recipe was alright, it still may taste great, it just may feel a little less great if you over or under do it. Don't worry too much. Learn as you go and enjoy every sip.
Will a 20oz CO2 tank (paintball) provide enough gas to carbonate a batch with this keg?
Casey S on Dec 11, 2015
BEST ANSWER: I would think a 20 oz tank would have plenty to carb and serve a batch this size, though I haven't tried it. Best solution is a larger tank at home for carbing and a paintball tank or cartridges as a traveler. I just got one of these, think I'm going to go with the mini paintball tank regulator for mobility and I have a 20 LB tank with regulator at home to carb.
Is it stainless or aluminum?
A shopper on Mar 24, 2017
BEST ANSWER: The Cannonball is stainless steel and very well made. The small size is easy to handle, clean, and is stackable to save space in the refrigerator.
To use the mini keg do you just brew and ferment your one gallon kit as you normally would and then transfer the beer into the mini keg and attach the Co2 to carbonate? No sugar tabs? No bottling? No conditioning time? How much time does this save overall in a one gallon batch if you bottled with sugar tabs and allowed for bottle conditioning time? Thanks!
Roy H on Feb 26, 2017
BEST ANSWER: To use the Cannonball keg, just brew two 1 gallon brew kits or equivalent ingredients. Cool the wort quickly and transfer to a fermentor (a 5 gallon bucket or a Big Mouth fermentor). Add yeast and shake. For the next 7 to 14 days, shake the fermentor daily. When you observe that fermentation is complete (yeast may drop to the bottom), then transfer to a secondary fermentor or directly into the Cannonball. Force carbonate with a 2.5 lb or 5 lb gas container or a use a mini-regulator and a 7 gram CO2 cartridge. In a pinch, adding half a bag of Fizzy drops works as well. Let it condition for a few days. Although I used to brew for 1.75 gallons, I found that a 3 gal keg works better for me since it reduces how quickly I have to brew the next batch. Probably the hardest part of kegging is getting the carbonation right. The time it takes to brew to bottle or brew to keg may be relatively the same since both will require a little time to condition the ale. To determine if a Cannonball or a 3 gal keg will work for you, consider that 1.75 gal is about 19 - 12 oz glasses, while 3 gal is 32 - 12 oz glasses. To brew for a 1.75 gal keg, you may have to be brewing every weekend.
Will the beer carbonate by CO2 in the cannonball keg if there is no priming sugar added to the wort?
A shopper on Feb 2, 2017
BEST ANSWER: Yes, if you force carbonate. Their are many techniques for doing this...I've done both the "set it and forget it" and the "rock n' roll"...they both work.
I want to set this up with a faucet tap which parts do I need?
A shopper on Apr 7, 2017
BEST ANSWER: You will just need the faucet and shank with a 1/4" barb connection. You can cut the picnic tap off and reuse the same hose if you wish. The better solution is to use about 6-10ft of 1/4" hose to create more friction to lessen the amount of head coming out of the faucet.
Will the pressure on the co2 cylinder decrease if it is moved from room temperature to a colder temperature?
A shopper on Jan 10, 2017
BEST ANSWER: Stands to reason that the Co2 pressure within the tank would decrease if moved to a colder environment. The pressure regulator may have to be adjusted to satisfy dispensing requirements. You don't want very much pressure tho to dispense as it will just create unnecessary foam; 2-3lbs?
I just received this kit and purchased a standard 5lb CO2 tank to use with it. If I was to put a gallon (or 1.5 gallons) in this, what would be the best way to carbonate the home-brew? I have seen a few methods but none for such a small keg? Set it at 12 PSI and leave it alone for a week at room temp? What do you guys recommend as the best approach to force carb? Thanks
D A on May 17, 2016
BEST ANSWER: The most reliable way is the 'set it and forget it' method where you set at 11-15 PSI and leave for a week or so. You could set the regulator to around 30-40 PSI and set for a couple of days and that should do it faster. Some will even shake the keg at 30-40 PSI and this shaking can get the beer carbonated much faster so it can be enjoyed in the same day. The latter options run the risk of over carbonating though which will result in taking longer than the first method. Cheers!
What are the dimensions of this keg, regulator and co2 tank? I'm planning to buy a standard mini fridge to store it. Will there be enough room?
M I on May 16, 2016
BEST ANSWER: Keg Dimensions
Base Diameter (diameter of body): 9"
Height of Body (not including handles): 9.375"
Height with Handles: 10.75"
Base Inset/Top of handle diameter: 8.5"
depending on which size CO tank it should fit fine.
I'm interested in getting this for my husband as a gift. I don't know much about brewing but he's passionate about it. What size C02 tank would I need to purchase with this and is there anything else I would need to get as well?
A C on Mar 18, 2016
BEST ANSWER: The 5 lb., 10 lb., and 20 lb. cylinders would all work, but I would probably recommend the 5 lb. for a keg this size.
Using mini-keg for secondary fermentation/conditioning? Can I move my fermented beer into this keg as a secondary and then carbonate and serve from the keg? What I mean is: 2 weeks in glass Big Mouth fermentation, can I move it to this keg and add oak cubes/bourbon for a week and then carbonate and serve? Os should I just add my oak/bourbon to the primary and let it sit there?
Roy H on Aug 25, 2017
BEST ANSWER: I have forced carbonated in the cannonball, I imagine it'd be OK to use as a secondary/carbonate/condition/serve vessel. Dip tube doesn't go all the way to the bottom, so "spent" yeast might not be an issue. But it is only 1.75 gl.
Is there a compatible carbonation lid for the cannonball keg?
A shopper on Aug 23, 2017
BEST ANSWER: The lid that ships with the unit is like a corny keg lied...so yes the seal allows for pressurization. I have used the rock-n-roll & the set-n-forgot methods and both seemed to work fine.
Can this be used as basically a large growler? If were to fill this from a larger keg of already carbonated beer, seal it up and purge oxygen with CO2 will it keep beer as it would if I were to fill directly from fermenter and force carb?
Matthew C on May 4, 2017
BEST ANSWER: You could do that, if you make sure it's sanitized properly and you keep it pressurized it should last just like any other keg, I mainly use it to force carbonate test batches, but this could be used anyway you want.
Will the pressure reading on the co2 cylinder decrease if it is moved from room temperature to a colder temperature?
A shopper on Jan 10, 2017
BEST ANSWER: The high pressure gauge will read basically zero pressure in the CO2 cylinder if you have them cold at fridge/keg temps. The serving pressure difference is super small and technically can be ignored. The only thing this means is that when cold, you can not rely on the gauge to tell you when you start to run out of gas.
Hi guys, I was just wondering what's the diameter of the mouth on the keg? Do you have any isometric images? Just thinking about the ease of cleaning... getting my arm in, in case my brews leave some trub or yeast in there.
D E on Aug 28, 2016
BEST ANSWER: It's a standard Corny keg opening, so if you have thin arms you can get in there. Its only about 10 inches deep so a carboy brush will work pretty good, otherwise pbw soaking overnight will turn it back to sparkling in no time.
Could I use this to carbonate water? I do some homebrewing but we also go through a lot of seltzer and I'm tired of the poor build quality of Sodastream machines.
D A on Aug 11, 2016
BEST ANSWER: I don't see why not? I don't know much about seltzer, but this allows your to dissolve co2 in liquid, so I don't see why not
I would like to use this for Cold Brew Nitro Coffee, can I attach a 5lbs nitrogen and use this for my cold brew nitro coffee needs? Thanks!
C E on Jun 29, 2016
BEST ANSWER: I am using it for nitrogen coffee. I'm not sure what you mean by 5lb nitrogen? I know nitrogen tanks are expressed in volume (for example I have a 22 cubic foot tank - which is a little larger than my 5 lb CO2 tank). Bottom line is yes you can use nitrogen and use it for coffee, but make sure you have a proper nitrogen tank and nitrogen regulator, as you have to push 30-35 PSI through it as opposed to the CO2 standard of 5 - 15.

But again, bottom line, yes you can use it for nitro coffee (it's delicious!)
I have a Cornelius hand held charger and was wondering if there is a way to connect that to the Cannonball input regulator?
D S on May 26, 2016
BEST ANSWER: If its a ball lock interface, it should connect , seal and pressurize the keg. Unsure if it will be enough to carb.....May be enuff to dispense
I use a 5lb tank myself. it works well and fits in the fridge after moving the shelves around.
jake on Mar 18, 2016
BEST ANSWER: The standard 5lb tank will definitely fit in a fridge with the cannonball keg, though there will likely be a need for a little reorganization depending on how your shelving is set up, and how tightly packed your fridge is.
Allowing for room for c02 how much beer can this hold/dispense? Could you expect an average of 18 12fl oz bottles out of this?
M S on Feb 23, 2016
BEST ANSWER: If you put a full 1.75 gallons into it, that would equal 18 12 oz beers. Not much space is needed up top, usually just an inch or so is left in the top of a keg when filling it. This is so the gas-in dip tube is not submerged, so liquid cannot flow back up the gas line if the CO2 tank pressure dropped. -Mike W, Northern Brewer
Will this support an internal gas tube with a carbonating stone?
A C on Feb 5, 2016
BEST ANSWER: There is a gas dip tube You could hook up a carbonating stone to that. I hope that answers the question!
Can this regulator be used with a 20 oz CO2 canister or will it require a different regulator/additional equipment?
O R on Jan 2, 2016
BEST ANSWER: The regulator in this system is set up for standard CO2 cylinders (2.5lb, 5lb, 10lb, etc.). I don't believe I've seen 20oz CO2 cylinders/cartridges with that exact threading before, but I could be wrong.

Cheers, Gabe from NB
Just got this, super excited to use it, but have some questions - thanks!

Q1: On average, how long does it take to carbonate the amount of beer in this mini keg?

Q2: How much headspace are you supposed to leave?

Q3: Can you bottle after force carbonating your beer from this keg? if so, what equipment would one suggest?

Q4: Once carbonated, in how long should one consume all of the beer?
S A on Dec 10, 2015
BEST ANSWER: Thanks for the questions! The time to carboante varies based on your approach. If you set and forget the keg at a certain pressure it will take about 1 to 1.5 weeks to carbonate. Look at the pressure chart we post. Otherwise, you can quickly carbonate by setting pressure higher like to 30 psi and then shake the keg. This can over carbonate so can take some practice to get the procedure down, but that approach can take as little as about 4 hours.

Just leave enough so the liquid is not reaching the liquid dip tube. That way you won'y spray liquid all over when relieving pressure.

You can bottle from the keg. It can be as easy as getting a bottle filler and a #2 stopper and using the black plastic faucet. The correct equipment would be the last straw bottle filler or blichmann beer gun, which will require a splitter or distributor so you can supply two feeds from the CO2 tank.

The time to consume is the same as if bottled. Drink it all within 6 months roughly for every beer. Highly hopped beer and highABV beers will take longer to go bad, but using 6 months as a base is a wise assumption. Cheers! James J.
What additional items do I need to purchase, beyond the beer ingredients? Do I need equipment to pressurize the tank, etc.
A E on Dec 7, 2015

Thank you for choosing Northern Brewer! Other than the equipment and ingredients to brew the beer, you will need a CO2 tank to carbonate the beer, and to use as a carrier/propellant for serving the beer. I hope that this helps!
Is there an instructional video available?
S M on Nov 25, 2015
BEST ANSWER: We do not have a video specific to the cannonball system but here are two links to videos we made on kegging. The information is all the same

the only difference is size. Cheers! James J.


I have purchased the Draft Brewer Cannonball Mini Keg System which is in shipment. My question has to do with cold conditioning. When I bottle my unfiltered beer I give it many months in a refrigerator to cold condition. The result, especially with fruit beers, is a mild smooth taste that I love. Can this be achieved with this cannonball system?
C A on Nov 1, 2015
BEST ANSWER: You can treat any keg like it is a big beer bottle. Meaning that if you would normally cold condition your bottles for a few months then you could certainly do the same here.

Gabe from NB
Can you bottle from this?
David C on Oct 31, 2015
BEST ANSWER: Yes you can. A BeerGun or Last Straw bottle filler would work great with this keg.
Can you use this for small batch kit. ( the 1 gallon kits). Is it too much extra space @1.75 gallons.
F U on Oct 28, 2015
BEST ANSWER: Don't know; I only make 5 gallons batch. Keg some; bottle the rest. However, it shouldn't a difference, gt eget the air out , purge it with co2.
When will this item be in stock?
K E on Oct 16, 2015
BEST ANSWER: It should be back in stock next week. If you add the product to your Brew List you'll receive a notification as soon as it is back in stock.
Where can I buy replacement lines?
A shopper on Nov 6, 2017
BEST ANSWER: We sell all that! Gas line assembly: KX03 Liquid line assembly: KX05 We also have the individual parts, so you could make your own lines of whatever length you wish.

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