FermZilla Conical Fermenter - 7.1 gal. / 27 L

FermZilla Conical Fermenter - 7.1 gal. / 27 L

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The new and improved FermZilla in 27L brought to you by the critical minds and engineers behind the original Fermentasaurus Gen 1. Although the original Fermentasaurus was revolutionary at the time of its conception, there's always room for improvement. This is partly due to the strong community of Fermentasaurus users who have helped push for an improved conical unitank.

The FermZilla is the perfect option for brewers that want all the advantages of a conical fermenter without the price tag of a full blown stainless steel unit. It allows you to dump trub, harvest yeast, and with the addition of the 27L FermZilla Pressure Kit, you can carbonate and serve – all in one vessel! The clear PET tank allows you to visually monitor fermentation activity and is pressure rated to 2.4 Bar (34.8 psi), which means you can ferment under pressure, reducing ester and fusel alcohols in your finished beer. This also gives the ability to perform pressure transfers. If you prefer to move your finished beer to a keg or other vessel, you can do so with little to no oxygen exposure.
New and Improved:
1. Larger Dump Valve - 3" butterfly dump valve is more resistant to clogging from large amounts of trub
2. Larger Opening - 4.75" top port opening allows for easier cleaning
3. Less Headspace - more appropriately sized for 5-gallon batches. Purging the headspace of oxygen is easier and more effective.
What's Included:
  • FermZilla 27L Tank with Butterfly Dump Valve
  • Reinforced Stainless Steel Stand
  • Top Lid with PRV (35 psi)
  • 1000 ml Collection Container & Lid
  • 3-Piece Airlock
  • Graduation Sticker
  • Adhesive Thermometer
  • Strap Wrench
  • Spare Seals


  • 27 L (7.1 gal) Total Volume
  • Pressure Rated to 2.4 Bar (34.8 psi)
  • Height in Stand - 28.3"
  • Height w/ Airlock - 32.7"
  • Tank Diameter - 13.9"
  • Diameter in Stand - 15.7"
  • Lid & Collection Container Ports - 28 mm PCO 1881 threads
  • Temperature Rating:
    • When not under pressure, do not expose to liquids above 131°F
    • When under pressure, do not expose to any temperatures above 95°F*

*Please note that the temperature rating for the FermZilla tank is lower when using it under pressure. When not under pressure, it is perfectly safe to transfer wort into the tank below 131°F or to use hot liquids below this temp for cleaning. When under pressure, make sure to keep your fermentation temperature below 95°F and keep the fermenter in an environment that is below 95°F ambient. This is especially important when fermenting with kveik yeast. These strains are known to ferment hot if no temperature control is being used. Exceeding the temperature rating may compromise the tank, leading to a shorter life span or sudden failure to maintain pressure. Even with proper use, we recommend replacing the tank every two years.

Please note: when using the FermZilla under pressure, you must perform a water pressure check to ensure your connections are leak proof. To do this, fill your FermZilla up with water, apply at least 15 psi pressure, and check for leaks around all caps and threads.  

Pressure Stress
If you use the FermZilla to ferment under pressure, or you use CO2 to pressure transfer or force carbonate your finished beer, it is very important that you conduct semi-annual inspections of your tank. Even with perfect care, the FermZilla tank may show signs of wear from pressure stress over time. We recommend visually inspecting your tank for stress creases or other signs of wear once or twice a year. A hydro test should be conducted every two years, even if no signs of wear are found. The process is simple:

  • Fill the tank to the brim with water
  • Replace the Red PRV with a Green PRV rated to 4.5 BAR or higher
  • Pressurize the tank to 4 BAR (58 psi)
  • Check for leaks, then replace the Red PRV when finished

If leaks or potential points of failure are found, replace the tank before you continue using pressure with your FermZilla.

General Care
Taking good care of your FermZilla begins with cleaning and sanitizing the unit before and after use. The tank is made from food-grade PET, which is beautifully clear, but can be sensitive to long soaks in cleaners and acid-based sanitizers. In general, we do not recommend leaving products like PBW or StarSan soaking in the tank for more than an hour. Extended soaks have the potential to degrade the PET material and shorten the lifespan of the tank.

Having Trouble Removing The Lid?
The easiest way to take off the lid is to undo the lid ring then use a screw driver or faucet wrench to lever the lid up as shown in the animated GIF below:


Kegland Part number: KL06835

NOTE: FermZilla tanks are marked with a manufacturer’s “expiry date”. This does not indicate that the tank is bad after this date; it simply indicates that a hydro test may be in order. 2 years after production and every 2 years after first use, it is recommended that the tank be hydro tested to ensure the tank is holding pressure. Hydro test instructions are available here. You will also need the D1072 Green PRV to perform the test. If you do not plan to pressurize the fermenter, the test is not necessary.

Community Q&A

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Browse 29 questions Browse 29 questions and 49 answers
Why did you choose this?
MoreFlavor Store
For easier fermentation with closed transfer and possible pressure fermentation.
Jeremy W on Feb 24, 2023
Brewing the IPAs and stuff
Zachary C on Feb 22, 2023
For easier fermentation with closed transfer and possible pressure fermentation.
Jeremy W on Feb 24, 2023
good reviews, price
Mark R on Feb 23, 2023
Brewing the IPAs and stuff
Zachary C on Feb 22, 2023
Good price for conical fermenter. Good reviews.
Todd H on Feb 16, 2023
allows temperature regulation w/ monitoring and pressurization
William Miller I on Feb 14, 2023
Gerold B on Jan 13, 2023
good product, great price
KEVIN H B on Jan 6, 2023
I need the lees catcher at the bottom and it's less expensive than a catalyst fermentation system
Walter M on Dec 30, 2022
Paul B on Dec 29, 2022
Jacob h on Dec 23, 2022
I own one already
Nathaniel F L on Dec 22, 2022
To upgrade from bucket fermentation vessels.
Steve Ayers on Dec 2, 2022
ready to upgrade to conical fermenting
Dexter L on Nov 30, 2022
Gift for my son.
Sherrie W on Nov 26, 2022
Glass carboys are so 10 years ago- closed fermentation is the goal
Dustin S on Nov 1, 2022
To brew mead
Tyler B on Oct 20, 2022
You tube reviews.
Mike E on Oct 10, 2022
I want to play!
Doug M on Oct 6, 2022
Right size and clarity to see fining is working
Douglas F B on Sep 26, 2022
I want it!
JAMES LUCIER J on Sep 15, 2022
Kurt O on Sep 13, 2022
Pressure Fermentation
Michael G on Sep 6, 2022
To make my brewing experience easier.
Robert S on Jul 29, 2022
Conical fermenter that I can harvest yeast and pressure ferment
Mattie Fuego on Jun 24, 2022
looking for better than my 30y/o system plus should be easier
D F on Jun 18, 2022
Great product that provides great results
Adam T on Jun 10, 2022
This Fermzilla is a total change with the possibility of fermenting my homemade beers under controlled pressure
Osvaldo S on Jun 6, 2022
To upgrade from old bucket fermentation
John A. Collins on Jun 6, 2022
For my husband's birthday
Kristie S on Apr 30, 2022
all in 1 packaging
Dennis F on Jan 5, 2022
Price and features.
David M on Dec 30, 2021
On Son's Christmas List
Nicole B Z on Dec 22, 2021
MY husband wants it for home brewing
Brittany G on Dec 22, 2021
Recommended to me
Leilani R on Dec 15, 2021
Fabio S on Dec 2, 2021
I need a fermenter
william w on Nov 24, 2021
ease of brewing
Bryan Cary B on Oct 26, 2021
requested Christmas gift
Deborah L. G on Oct 22, 2021
It is not too tall.
Fischer Additives L on Jul 30, 2021
trying a new process
Max S on Jul 24, 2021
Wanted the smaller one to go with my 55L for smaller batches
Alex M on Jun 26, 2021
saw it on a youtube
Bennet M on May 21, 2021
Great Review by David Heath Homebrew
William P. H on May 19, 2021
Good Reviews + Features
David L on May 6, 2021
FRANK M on Apr 22, 2021
Pressure fermentation for half the cost, plus you can still watch it ferment.
William on Apr 16, 2021
I really like the one a bought a couple months ago
Jim Elrick on Apr 13, 2021
Based on all that I want to do, it was my best choice
Marlon H on Apr 10, 2021
Excellent price for what it can do.
David A on Apr 10, 2021
beer in a week! heard about it on youtube
Jacob Burkhalter C on Apr 6, 2021
good reviews, price
Mark R on Feb 23, 2023
Good price for conical fermenter. Good reviews.
Todd H on Feb 16, 2023
so how would you take a hydro reading when under pressure?
Rick Runyan on May 9, 2019
BEST ANSWER: Use a tilt.
Tilt™ Hydrometer and Thermometer - Orange
Tilt™ Hydrometer and Thermometer - Orange
Can you rack directly to bottles from this unit?
Tom DePoto on Aug 24, 2019
BEST ANSWER: Yes. It comes with a floating dip tube which will help keep trub outta your bottles. A good cold crash with compact the trub cake too.
Can this be taken off the stand and put in a fridge? Will the bottom support its weight? If not, is there a good way to keep the temp low?
Charles Richardson-Gongora on Apr 20, 2020
BEST ANSWER: Unfortunately you cannot take this unit off of the stand when it is full. It is entirely top heavy and cannot balance reliably on the collection ball or the valve. There are a few ways to keep it cool from inserts, huge fridges, jackets with icepacks, and a lot of other imaginative ways. Please explore our options on the website and see which option seems best for you.
will you do a funnel attachment for bottling that goes instead of the container?
Alex Hellbach on Oct 31, 2019
How do you transfer beer from the new style Fermzilla to a Cornielus keg?
Thank you.
Jeffrey L Palmer on Oct 14, 2019
BEST ANSWER: Pressure transfer with two psi differential work good with minimal forming. Example: 12 psi on the fermenter and 10 psi on the corny keg controlled by a spunding valve
Can you purge the Collection Container?
Ryan White on Jun 27, 2019
BEST ANSWER: Hi Ryan - Is purging referenced in regards to dry hopping? If so, take a look at this thread on the subject: https://www.homebrewtalk.com/forum/threads/easiest-way-to-purge-hops-with-co2-using-a-fermentasaurus.648512/
Can you install a test port like you can on the fast fermenter?
Rick Runyan on May 5, 2019
BEST ANSWER: Hi Rick - The plastic on the Fermzilla is too thin to install a test port.
Can I use one step no rinse sanitizer and PBW for cleaning? Thanks
Tom Keller on Nov 21, 2019
BEST ANSWER: I just use oxyclean with warm water and final rinse with star-san in all my equipment. This has worked for me over the years. Cheap and efficient.
What is the width and height?
scott hoppel on Aug 23, 2019
BEST ANSWER: Hello Scott, here go some product specs:
Height in Stand - 28.3"
Height w/ Airlock - 32.7"
Tank Diameter - 13.9"
Diameter in Stand - 15.7"
Can I put boiling wort into this? At one point I thought I heard you can do this? Trying to save time on chilling.
Scott Childs on Aug 9, 2019
BEST ANSWER: Hi Scott - the FermZilla's tank is made from PET and temperature rated to 122°F. However, a PEN replacement tank, which will withstand temperatures up to 212­°F, is in development and will be available soon.
I am a new home brewer and did my first brew yesterday. Should I leave gate valve open or closed during fermentation?
Frank W Colbert on Jan 3, 2021
BEST ANSWER: I leave it open to transfer wort. Chill to temp. Close the valve, dump the trub, close the valve. Clean and sanitize the collection container. Then re-attach the container and add the yeast. Then I let it completely ferment and you are ready to collect yeast if needed.
What do you need to buy in order to purge the collection can of oxygen for dry hopping?
Rob Sletten on Jan 23, 2020
BEST ANSWER: Hi Rob - You can use either our item #'s KG500 or FE133.
I'm thinking of using this for small batches (2-3 gal.). Will the excess headspace in this fermenter be okay for the beer?
Ben Geib on Sep 21, 2019
BEST ANSWER: It’s will be fine for 2-3 gallons, the previous generation(fermentasaurus) was a 9.25 gallons sized fermenter and was commonly used for 5 gallons batches. Granting you have a strong fermentation everything’s should be good.
Good luck!
Can you install a port on the lid that will fit the BrewBuilt CoolStix?
Gabriel Burgos on Apr 18, 2020
BEST ANSWER: The coolstix looks like it would need a 1” bulkhead fitting. Morebeer sells a Temp Twister Cooling Coil complete with bulkhead fittings that would easily fit and made for the Fermzilla. It is relatively inexpensive. You can still install the pressure kit and thermowell for temperature sensing.
How do you use the FermWrap with the Fermzilla and the Insulating Jacket? I thought the Fermzilla couldn't use a heater because it's plastic.
Rob Sletten on Jan 30, 2020
FermZilla Conical Fermenter - 7.1 gal. / 27 L
FermZilla Conical Fermenter - 7.1 gal. / 27 L
The FermWrap™ Heater
The FermWrap™ Heater
Insulating Jacket for FermZilla 27L Conical or 60L All Rounder
Insulating Jacket for FermZilla 27L Conical or 60L All Rounder
BEST ANSWER: If you read the fermwrap it is a low watt heater more like a heating pad not enough to effect plastic
could mason jar be used as a container?
Alex Hellbach on Oct 31, 2019
BEST ANSWER: The trub/yeast collection cup at the bottom of the fermenter is much larger in diameter than even a wide mouth mason jar. It has a different thread, and sports two additional ports on opposite sides. (See photo)
what are the dimensions without the stand?
Moises Celaya on Aug 5, 2021
BEST ANSWER: This unit is 28” top to bottom. (No fermentation lock installed.) Diameter of 13”.
What is a suitable PRV for the Pressure Stress test?
David Dooley on Jan 8, 2021
BEST ANSWER: The 'hydro test' procedure is not very well documented to my knowlege, so I personally completely understand this question. Here's what I've personally come up with, FWIW.

First, the stock PRV Pressure is 35psi and the instruction manual found on the manufacturer's website repeatedly warns against exceeding 35psi. My conclusion is that a full pressure test of the vessel would mean testing it to 35psi. To hydro test I fill the vessel with the collection jar attached and the butterfly valve open with circa 2gals of water and approved soap (PBW) solution. Next, I attach a CO2 bottle with the pressure set to 0psi. I start adding pressure with 10psi and then increase by 5psi at at time until the vessel reaches 35psi, stopping between each pressure step to allow the vessel to settle. Once the vessel has reached 35psi, I verify that the prv is releasing pressure and opening. I do not ever exceed 35psi and my PRV has always opened at this pressure.

I do not keep the vessel at this pressure for long. I do not ferment anywhere near this pressure, so to reduce stress on the vessel, I next reduce the vessel pressure to 24psi and look for any leaks. After a few minutes, I lift the vessel from the stand and carefully turn it upside down and place it back into the stand upside down I let it sit for 10 minutes or so and verify that there are no leaks.

A couple of maybe helpful tips and safety items: 1 - Wear safety glasses or goggles! On one of my vessels, the collection jar blew a peice out of the side of it at about 20psi during the first hydro test and the polycarbonate piece left the vessel at an insane speed. Morebeer quickly replaced the defective collection jar.

2 - I would recommend hydro testing the unit in a garage type wash tub, if you have one. If your vessel experienced a rare pressure failure, water will go everywhere, but most will go down the drain.

I hope this was a helpful answer!
I would like to purchase (separately) two of the stainless ballocks like the ones that come with the pressure kit. Are these available and if so what is the cost? Thank you.
Jeffrey L Palmer on Oct 27, 2019
BEST ANSWER: Hello Jeffrey, the ball lock fittings are currently not sold separately.
Do you sell collection containers separate? I just broke mine because it's difficult to unscrew from bottom.
NATHAN POHLIT on Oct 18, 2019
BEST ANSWER: Hi Nathan, yes we do it's item number FE120.
Collection Container for FermZilla
Collection Container for FermZilla
Can I use this one for wine fermentation?
Adil Poyraz on Oct 13, 2019
BEST ANSWER: I don't see why not.
What size are the threads on the lid where the quick disconnects thread on?
jeff royster on Sep 23, 2019
BEST ANSWER: Hi Jeff - they are 28 mm PCO 1881 threads, the same thread type found on most plastic soda bottles.
Hello, I have a FermZilla on the way. Thanks! Is there anyway I could get a "Jacket" ? I'd like to temperature control the brew. They are available in AU but they cannot ship. Any idea when they will be available?
David Fontaine on Sep 6, 2019
BEST ANSWER: Hi David, the Fermzilla Jacket is currently in development in our system. We're planning on getting out first order toward the end of October - early November. We'll release the item on our website when we have more information.
Any plans for replacement parts? I buggered my lid and I am unable to pressurize.
John Morris on Aug 25, 2019
BEST ANSWER: Hi John, yes we do have plans for replacement parts. They are currently in development with no current eta. Please don't hesitate to check in with our customer service team for updates.
Can I use my Fermentasaurus pressure kit with femzilla?same size lid?
Chris Robertson on Aug 23, 2019
BEST ANSWER: Hi Chris, no as the lid of the Fermzilla is wider than the Fermtentasaurus. The lids on the Fermzilla's come fixed with the body connect threads and are covered by plastic caps. The Fermzilla Pressure Kit includes the body connects to install on the existing Fermzilla lid, the stainless float, and silicone dip tube.
What Temp Control options are available for this? And when will they be available?
Oscar Garcia on Jul 5, 2019
BEST ANSWER: Hi Oscar - We do not carry temp control products specifically designed for the Fermzilla, however, we do carry the Fermentasaurus Jacket and FermWrap fermentation heater.
Does anyone know if there will be a thermowell option and CIP (clean in place) option as well?
Jack Carlos Slovenski on May 30, 2019
BEST ANSWER: Actually, KegLand recently released a video on how to install a thermowell in the Fermzilla. I can post the link here, but just Google "Fermzilla thermowell" videos, or search on YouTube
Are ball lock fittings included with the top?
Brian on Jul 11, 2019
Will there be a jacket for this like the original fermentasaurus? Or will that jacket work with this?
Andrew Wayland on Feb 2, 2019

4.5 / 5.0
66 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 2 out of 5
Not impressed
I sent it back (which was very costly). Not impressed with the sticky butterfly valve and the overall construction....quality material but design is clunky and the clean up must be a nightmare with all the parts and disassembly etc. I did not use it. Disappointed as I do enjoy my Brewzilla a lot.
December 13, 2022
3 months ago
Rated 5 out of 5
Great fermenter
I've only used it for a couple 5 gallon batches, but it works perfectly. I particularly like that it has enough headroom to prevent boil over in active fermentation.
October 31, 2022
5 months ago
Rated 2 out of 5
Has Potential
Poor instructions. Leaky. I think I can fix the issues but it shouldn't be so difficult.
October 4, 2022
6 months ago
Rated 4 out of 5
Fermzilla first impressions
Fermzilla arrived in a timely manner. No time to use it yet. I did leak test it under pressure after assembly,
No leaks! Be sure to note the left-hand threads on one joint during assembly. It appears sturdy, but the butterfly valve does leak even with no pressure. Not a game changer, and I'm thinking of a work-around will solve the issue.
September 27, 2022
6 months ago
Rated 3 out of 5
Shipping damage, but so far it’s alright.
It came in a box that was pretty tore up and taped up all over one corner. It had scuffs on the PET other than that it looks to be ok. I’m in the process of pressure testing it.
User submitted image
User submitted image
User submitted image
July 9, 2022
8 months ago
Rated 5 out of 5
Great Design-Easy to use
I actually have a batch of wine in it right now and all is well so far. There are a few similarities to brewing beer when fermenting wine. The must ( trub in wine talk) is falling to collection vessel, may be somewhat difficult to empty without spillage. I’m sure same difficulty will be there when doing a batch of beer. Overall I like the design, wide top opening to access wine to punch down grapes, and stir to degass. Should be easy to clean again due to wide mouth, light weight, relative ease in disassembly, (do not use enclosed wrench to tighten components- hand tight is good enough). Also like the options to upgrade to pressure fermentation. It’s a nice upgrade from bucket fermentation.
June 20, 2022
9 months ago
Rated 5 out of 5
I would totally recommend this product, so much so that I have 2 of them. Easy to use, easy to clean. Doesn’t take up too much space. All around I’m happy with the fermzilla.
February 25, 2022
1 year ago
Rated 1 out of 5
More hassle than it’s worth!
This product has been very disappointing to say the least. I should have known something was amiss when I unpacked the fermenter and had great difficulty separating the spigot and thread ring, which came screwed together. After my first use of the fermenter, i found it extremely difficult to disassemble the dump valve and collection container for cleaning, even with the use of two removal tools, and another set of hands! On my second use of the fermenter, I carefully greased all threaded parts before reassembling. I still could not separate the dump valve from the spigot. This product is not worth the hassle and not recommended.
January 5, 2022
Rated 5 out of 5
How Did Life Exist Before Fermzilla?!??
This fermentation vessel is easy to assemble, set up, clean and use. Once you start pressure fermentation, you will never want to go back. I love how easy this is to clean with a little PBW solution and a microfiber cloth.

You will help yourself out tremendously by downloading and reading the assembly and use instructions prior to receiving your vessel. Perhaps several times. Here's a couple of use and cleaning tips I've found to be helpful:

1. Do NOT over tighten anything. No need to go gorilla on any part. I have two of these. My first, absolutely no leaks, hand tightening all items only. However, on my second vessel, the small port caps on the collection jar leaked whether using the bottle caps or carbonation caps. A couple wraps of teflon tape on the threads solved this problem rather effectively.

2. I do not completely dissassemble the vessel between brews, reserving complete dissassembly for every 6-10 fermentation cycles. I brew once or twice a week and I have had no contamination issues using this method. I thorougly clean and hydro test for leaks every time, but I do not fully dissassemble except occasionaly as stated above.

3. Before you assemble, work the butterfly valve several times from fully closed to fully open. They tend to be really, really tight at first and may be difficult to close fully if you do not work the valve before you put it into use.

4. Watch your Krausen height. If it comes into contact with the PRV, remove and clean the PRV as soon as possible or it may not operate properly.

5. Use the belt wrench that comes with the vessel to loosen only. There is no need to go gorilla on tightening any part of the vessel when assembing it. However, you will be glad you have the belt wrench tool when you disassemble.

6. Get some keg lube or use pure petroleum jelly (which is what keg lube actually is) on threads and seals occasionally per the manufacturer instructions. Petroleum jelly is food safe and approved for contact with food. It is non-toxic and can be purchased in greater quantity for less cost than Keg Lube. However, if you are skeptical of this recommendation, get genuine keg lube. You don't need very much at all and one tube will last you for years.

Since I started using pressure fermentation with the Fermzilla, my beer consistency is much better, I keg the beer with closed transfer, which prevents the finished beer from coming into any contact with oxygen until it exits my kegerator and enters my glass. This has resulted in a greater shelf life to my homebrew. My family and beer tasting friends have noticed that my already kid tested and mother approved beer has improved noticeably for the better. It is smoother, clearer and crisper. I do not filter my beer, but everyone believes I do because it is so beautiful in a clear glass.

Sorry for the book! I love using these fermentation vessels! Thank you MoreBeer!!
Fermzilla Fermentation.
Fermzilla video during fermentation.
October 15, 2021
1 year ago
Rated 5 out of 5
Really helps in the fermentation of our wines.
August 5, 2021
1 year ago