Williams Warn BrewKeg10 - 10 L (2.64 Gallon) Conical Unitank Fermenter

Williams Warn BrewKeg10 - 10 L (2.64 Gallon) Conical Unitank Fermenter

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So the first thing to understand is that this is a Unitank - you will be fermenting and serving from the same tank. The lid has an adjustable pressure relief that you can set to different pressures. More on that later while first we talk about why we are so high on these...  

The #1 reason we love the BrewKeg Unitanks is that they eliminate kegging day, which saves a bunch of time. We use two Brewkegs per five gallon batch, and with the low profile, fit them both into a kegerator for fermentation. When fermentation is done, crank down the temp, remove the yeast/trub collection ball and start immediately drinking because the beer is already carbonated. Because this is not standard brewing process stop and think that over - you don't need a separate night or hours on a weekend morning to clean and keg. You are going to save 2+ hours with every batch. Plus you are skipping the most oxidative step in brewing of going from your fermenter to your keg.  Yes, the one down side is that your fermenter is tied up as a keg but to many of us who really love brewing our own beer but are time challenged - totally worth it.  

Another great time savings is that you can skip wort cooling and 'hot pack' these little kegs, literally filling them after boil at around 190F. Stick them in your refrigerator, let them cool overnight, and pitch yeast the next day.  Hot packing is gaining a lot of traction and we suggest you google the term to learn more.  Its been a standard practice in Australian homebrewing for years.   

You might also think, man I would love this but I would prefer (1) 5 gallon size. Fair enough and BrewKeg is coming out with that soon. But what some of us at MoreBeer! really dig about having two per batch is #1 they fit in kegerators and small refrigerators and when finished they are super handy to grab and go.  Using two Brewkegs per five gallon batch also allows us to split yeast strains which gives us two variations of the same beer. It is super cool to learn the massive affect yeast has on the same beer. You can also dry hop in one and not the other and fruit flavoring or coffee, etc. 

Okay, so there is not a lot out there about fermenting under pressure. We've been doing it for almost a year now with the Fermentasaurus and the BrewKeg and if you want to make amazing lagers quickly you need to try it.  Fermenting under pressure reduces esters and even beers fermented between 65-80F have amazing German lager malt profiles.  Recently we fermented a beer under pressure with WLP001 at room temp and all the tasters thought it was lager yeast.  The pressure relief assembly, in the center of the lid, is the slickest out there and adjusts from no pressure up to 25psi. Leave it open for no pressure fermentations of ales and IPA's where you want the esters. Close it down to make amazing lagers under pressure, quickly.   

We've heard it is too expensive. Yes it is not the cheapest option by any means, but two units are still cheaper than some 5 gallon unitanks and we love the 2.6 gallon size and easy handling.  We have A LOT of great inexpensive fermenters. This is purpose designed, cutting edge, and well... it costs more.   

You might also see that WilliamsWarn, the maker of this keg, also makes no-boil brew kits. At first that seemed like a trip back to the 90's, when we first started, and we turned up our nose at it. But the kits are made with Briess DME which is preboiled. Then a can of fresh, also pre-boiled, hopped malt extract is added.  So we gave them a try. They take 15 minutes to make because you are literally mixing a small amount of hot water with the kit, dissolving the extract, and filling with cold water. Pitch your yeast and your off the races. In New Zealand where Williams Warn is based they are having a resurgence of homebrewers because the Brewkegs, along with a kegerator, and the no boil kits makes homebrewing about as easy as it gets. And the beers are good! Especially, especially if you want to make summer lagers because the DME keeps the beers really light and the pressure fermenation adds delicious German lager flavor.  So consider the fact that you can make 2.5 gallon no-boil kits in these a serious bonus. 

Here is a recap of the No-Boil process:

  • Clean and sanitize your BrewKeg
  • Boil 500 ml of water
  • Add Malt Extract and hot water and stir until dissolved
  • Add your hops and any other ingredients your recipe calls for
  • Top up with water until you hit the 10 L mark
  • Add your yeast and seal the BrewKeg for the fermentation
  • Pressurize your BrewKeg to 25 psi and ferment
  • Serve and enjoy!

Physical BrewKeg10 Features:

  • Made from stainless steel
  • Large 2" + drain at bottom of conical is the best yeast eliminator we have seen. 
  • Extra large, easy to remove sediment ball
  • Standard ball lock gas in and beer out connection posts 
  • 25 psi working pressure & built in relief valve
  • 2 Units will fit perfectly in our kegerators

Process features

  • Eliminates Kegging day and the cleaning of kegs
  • Eliminates the oxidation associated with kegging  (Big craft breweries go to extremes to try and reduce oxidation in the bottling/canning/kegging process)
  • You can hot pack and skip wort chililng to speed up brew day
  • Beer is carbonated perfectly at the end of fermentation
  • Beer ready to enjoy sooner
  • Ferments clean lagers from 64 - 82 F
  • BrewKeg Accessories like the injector make injecting finings, flavorings, hops, etc a less oxidative process
  • Easy to clean and sanitize
  • WilliamWarn 2.5 Gallon No Boil kits available


  • Height: 23.25 in.
  • Diameter: 9.25 in.
  • Actual Volume: 12L (3.17 gal)
Community Q&A

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Browse 7 questions Browse 7 questions and 29 answers
Why did you choose this?
MoreFlavor Store
Seems like a great all in one solution after reading reviews
brian on Jun 28, 2022
Looking to brew some smaller batches during the winter months
Derek M on Nov 19, 2021
Seems like a great all in one solution after reading reviews
brian on Jun 28, 2022
It is the best small batch fermenter on the market. You can harvest and repitch yeast easily, it can be pressurised, and it is stainless steel. No other ones really compare.
Sirius B on Nov 19, 2021
Looking to brew some smaller batches during the winter months
Derek M on Nov 19, 2021
Already have one BrewKeg10 and sought another. These are great Unitanks!
Jeffrey B on Jan 19, 2021
Ease of use
Valued C on Oct 24, 2019
Brew size, and it will fit in my fermenting chamber.
Paul T on Jul 29, 2019
watching williams warn for several years
Valued C on Mar 25, 2019
Pressure Brewing system
Valued C on Jan 23, 2019
This is the best way to ferment beer. Under pressure!
Daniel D on Oct 1, 2018
Because I'm curious to make beer with a new system, I also saw New Zealand publications
Cristian Torres S on Jul 18, 2018
I have been using 6 gal glass carboys and bottling in Kolsch style glass. I want to simplify my operation. Glass can be hazardous but has advantages, but after 10 years lets try something new. Cheers.
George L Schmidt on May 8, 2018
Great time saving solution if you have the room
Kevin J R on May 2, 2018
Seemed like a great option for a newby. All the work is done in one devise without the need for transferring. The no boil option looked easier since I haven’t done this before
Dan on Mar 1, 2018
It is the best small batch fermenter on the market. You can harvest and repitch yeast easily, it can be pressurised, and it is stainless steel. No other ones really compare.
Sirius B on Nov 19, 2021
Already have one BrewKeg10 and sought another. These are great Unitanks!
Jeffrey B on Jan 19, 2021
Is brewkeg made of 304 grade or 316 stainless steel?
Kuoting Hua on May 12, 2019
Can you use a beer gun to fill bottles from this unit?
Daniel Pickering on Nov 29, 2019
BEST ANSWER: Hello Daniel, we see no reason why you couldn't. These BrewKegs are outfitted with standard ball lock gas in and beer out connection posts.
Can you use a regular corny keg lid instead? Is the opening in the keg itself the same?
Daniel Williams on Nov 6, 2018
BEST ANSWER: No. The opening is actually bigger and the lid is bigger and better. The lid has the spunding valve built into it and you can actually see through it so you can visually see that fermentation has started.
Can you attach a blowoff hose? (for non-pressure fermentation)
Michael Dedina on Oct 12, 2020
BEST ANSWER: No need to attach a blow off hose in my experience. Just open the spunding valve. One note of caution though: Do. Ot overfill lest an active fermentation bubbles up through the valve.
When Hot packing a Unitank what is the process and recommendation to oxygenate the cooled wort when pitching yeast? Effect on fermentation?
George L Schmidt on May 6, 2018
BEST ANSWER: After 'Hot Packing' the Unitank, and it's allowed to chill; we would recommend oygenating just prior to pitching yeast. This gives the yeast maximum exposure and absorption to the o2 before it evaporates out. The effect on fermentation is a stronger more vigorous yeast cell.
What comes in the kit?
Carl Capito on May 2, 2018
BEST ANSWER: The brewkeg, pressure lid, dip tube, and collection bottle come in the "box". The brewkeg itself has the butterfly valve, handle, and adaptor needed to attach the collection bottle. The new bottles can and do hold pressure and will not burst if used as directed. Also in the "box" is the neat little packging tube that the keg comes in. I am converting mine to hold brewing related odds and ends that I need on brew days when using my big kit.

4.6 / 5.0
9 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 3 out of 5
Why don’t you sell the keg replacement parts?
These kegs are awesome! Simple to ferment in under pressure. Cold crashing is easy and the butterfly valve lets you close off the sediment bottle so you don’t need to keg transfer. Get two so you can split your 5 gallon batch and experiment with yeast and dry hopping.

My only complaint is that MoreBeer does not source any replacement parts and Williams Warn makes it difficult to buy if don’t live in New Zealand. Why do you sell these kegs, but not the parts? This is a five star product, but I hold it at 3 stars until the parts are available. This may be a huge deal breaker for some because if you lose or damage any parts, good luck finding a replacement. You might as well throw your money in the trash.

Parts that will need to be replaced over time are the plastic keg lid, keg lid o-ring, plastic dip tube, and sediment bottle. The keg lid and sediment bottle are not standard size, so I’m not sure if you can find an alternative.
July 6, 2022
8 months ago
Rated 5 out of 5
Worth every penny
Well built, has built in gas valve (don’t need to buy a spunding valve), butterfly valve works perfectly, and it makes amazing lagers.
December 18, 2021
8 months ago
Rated 5 out of 5
BrewKeg10 is Impressive
This BrewKeg10 is perfect for when a full 5 gallon batch is just not what I need to brew and I'm not fond of tying up my regular conical fermenter with a half batch. Sometimes it is a recipe that I am experimenting with or I just don't need 5 gallons of that particular beer. This is a well made unit that looks impressive and feels substantial. Being able to remove the yeast and trub from the bottom of the cone is a big plus for me, and not having to rack my beer over to a separate corny keg to serve it is great.
December 16, 2019
over 2 years ago
Rated 5 out of 5
Pressure fermenting
If you are not pressure fermenting in a metal fermentor, you are not doing it right.
November 24, 2019
over 3 years ago
Rated 5 out of 5
Excellent, well-made Uni-tank
This has made quick fermentation of my BIAB lagers a breeze. It's manual covers only WW's no-boil kits, so some words of advice for homebrewing, be sure to leave the trub behind in the boil kettle, the collection bottle simply won't hold the trub plus the settled yeast, so adjust your batch size to leave the trub behind and still collect 10L. This tank is well made, easy to use, and easy to clean.

Oh, one more thing, skip the larger sizes of this tank.
The collection bottle is not removable which reduces the utility of the tank tremendously.
October 17, 2019
Rated 5 out of 5
Better than I even imagined
Really have to give props to WM. I looked at a number of different conical vessels by different manufacturers, and I could not find a comparable product on the market that allowed me the ability to ferment under pressure + naturally carbonate, collect yeast for re-pitch, and conduct oxygenless transfers any easier than WM. An imperial stout is happily fermenting in primary as we speak!

Entry cost is not insignificant, but its a lot cheaper than other conicals out there (looking at you SS Brew Tech). Lid can be a tricky bugger, but my work around is to remove the PRV valve and rack through this hole after the lid is attached when the tank is dry (to avoid jockeying with the lid when the tank is full). This hole is unfortunately too tight for a standard 0.5 micron stone, but I may just switch to injecting oxygen through the gas post or get a carbonation stone.

Highly recommend! Will likely get a 20 L down the road. Accessories (pressure gauge, dosing device) are a bit steeply priced - plenty of cheaper DIY designs out there (only critical feedback).
October 9, 2019
over 2 years ago
Rated 4 out of 5
Well made piece of kit
The box arriving from MoreBeer contained a cylinder with an industrial type band that released the wooden top of the cylinder. The brew keg was well packaged.

Opening everything up for inspection showed a very nice looking stainless fermenter. The lid Is a smoke colored transparent plastic, well engineered and suitable for the task. It has built in connector posts for gas in and liquid out and it has a pickup tube. It also has a built in twist to open/close sounding valve.

The butterfly valve is tight, as it should be, but easy enough to open. The collection bulb os see through plastic and capable of holding pressure.

I have a couple brews run through this now and am impressed overall with its build quality and ease of use. The Bohemian Pilsner no boil kit was super easy and fast. I was skeptical but it turned out well and within the time frame advertised. (It was to my taste a bit bitter for the style but still quaffable. I entered it in a competition and my thoughts were echoed by the judges)
The beer was very clear and the ease of fermenting and serving from the same vessel is undeniable. The large lid opening makes clean up a breeze when the beer is gone.

Issues: These are minor and will not stop me from buying another. As another noted, there are no internal marking indicators. These would be handy. Maybe future tooling could emboss these during production. The pressure vent leaked the firs time due to a vigerous ferment, this has not been an issue in the last two batches. The collection bulb could be a bit easier to remove, it is very easy to spill some while manouvering the full bulb out the side openings. Getting the silicone old sealing ring just so can be a tad tricky but this is a really minor thing that is going away with more practice. Getting the pickup tube and lid into position also a bit tricky at first, again, probably need more practice.

All in all a lovely piece of kit that I can wholeheartedly recommend — especially if the price came down some. I really enjoy the 10 liter size. Since my friends don’t drink much it gives me more opportunity to get different styles into the fridge.
First noboil kit.  Ready to close up within half an hour of opening the kit.
Vigorous ferment caused bit of blow off through the valve.  Did not seem to affect finished product.
Finished beer
Settling out.  Hacked my own fermclear infuser, spare tube and fittings.
December 11, 2018
over 4 years ago
Response from MoreFlavor
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. Cheers!
December 12, 2018
Zach R Staff
Rated 4 out of 5
Good Product
Good product. I think the lid design could be a little better. It’s fully functional, just don’t like the way water/wort/beer, settles into the seems and kind of disappears. I also wouldn’t mind some volume markings on the inside to actually know how much wort has been transferred into vessel. Minor issues I will deal with, and probably look to get another soon.
September 18, 2018
over 3 years ago
Rated 5 out of 5
Buy one (or more). You won’t be sorry.
Has made my brewing life so much easier with great results!
August 31, 2018
over 4 years ago