Fermentasaurus Conical Fermenter - 9.25 gal. / 35 L

Fermentasaurus Conical Fermenter - 9.25 gal. / 35 L

Item currently out of stock

This is the older generation Fermentasaurus, which is no longer available. For the updated Gen 2 Fermentasaurus -- FermZilla -- please see FE110

The Fermentasaurus is a unique, game changing plastic conical fermenter for homebrewing. It is the perfect choice if you want to see your fermentation, dump trub, collect yeast, and even carbonate all in one vessel without any transfers or siphons.  Made from clear PET the Fermentasauras offers the classic benefits of a conical shape without the cost of stainless. It will drastically cut down on oxidation by removing any need to rack your beer to a secondary vessel. And perhaps most amazingly it can be pressurized like a keg with the addition of the optional Fermentasaurus pressure kit

The Fermentasaurus fermenter has a large 35L (9.25 gallons) size that makes it easy to ferment 5 gallon batches. The standard lid has a built in stopper and comes with an airlock. There is a butterfly dump valve at the base of the cone with a 500 ml harvesting container. This makes it very simple to remove the yeast at the bottom of your fermenter without exposing your beer to oxygen. The handy harvesting container also allows you to store the yeast to use on your next batch! The dump valve has been designed so that no threads are immersed in liquid making it easy to clean. Other fermenters will use ball valves that are very difficult to clean without completely disassembling them.

The Fermentasaurus is produced in Australia after four years of R&D. This fermenter is the world's first conical PET fermenter that is pressurizable up to 2.4 Bar (34.8 psi) letting you go from fermenting to serving without having to transfer to another vessel. You also have the option of fermenting under pressure which reduces esters and fusel alcohols allowing you to ferment warmer than you normally would. If you do choose to transfer your beer you can do it under pressure straight into a keg or other vessel with little to no oxygen exposure. 


  • 9.25G/35L total volume
  • Clear and easy to see through
  • Screw top lid with airlock
  • Butterfly dump valve 
  • 500 ml collection ball below dump valve
  • 304 stainless steel frame with carrying handles
  • Volume marker sticker down side of tank
  • Stick on liquid crystal thermometer
  • Includes barb for bottle filling from bottom dump that accommodates 3/8" or 1/2" tubing
  • Temperature rated from 32-131°F (0-55°C)
  • Rated for 2.4 Bar (34.8 psi) working pressure when used with optional pressure kit (Do not pressurize the Fermentasaurus without the pressure kit, FE101)


  • Total height with airlock - 37.6 in.
  • Total diameter - 14.9 in.
  • Tank height - 27.1 in.
  • Tank diameter - 13.5 in.
  • Top opening diameter - 3.25 in.
California Recipients: See Proposition 65 Information
Item # FE100
Shipping Eligible for Free Shipping Program
Availability Out Of Stock
Weight 40LBS
Community Q&A

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Why did you choose this?
MoreFlavor Store
Great reviews on it
John M on Oct 2, 2018
Louis M on Aug 10, 2018
Great reviews on it
John M on Oct 2, 2018
Size and price
William Aaron P on Sep 19, 2018
Louis M on Aug 10, 2018
Least expensive means to pressure ferment.
Royal Merrill on Aug 10, 2018
Good reviews
Jeff W on Aug 9, 2018
This is my third one.
Jeffrey Palmer on Aug 3, 2018
Trying out a new fermenter, to replace one of my bucket.
Scott J on Aug 2, 2018
Bought for friends as a gift since I already own one and really like it
Brent E on Jul 25, 2018
Highly Recommended
Antoine R on Jul 24, 2018
Overall reviews and I watched thei videos
Joseph Kamenar on Jul 14, 2018
Reviews and price
gregory D on Jul 10, 2018
Like the design, and ability to ferment under pressure. Related YouTube videos convinced me that this would be perfect for my setup.
Russell J on Jun 28, 2018
Unitank w/ pressure kit - space savings
Justin S on Jun 26, 2018
Price and size
ivy s on Jun 26, 2018
looks like an awesome product + good reviews
Tom p on Jun 8, 2018
need a large conical ferm that is easy to use and pull yeast/trub sediment
Austin R W on Jun 6, 2018
wanted a simpler fermentor to keg/bottle under pressure without spending 1000's
Howard K on May 23, 2018
Great reviews.
Eric W on May 22, 2018
It’s larger than the FastFerment and coming
Scott N on May 22, 2018
have purchased from you in the past reliable and fair prices
Leigh D on May 16, 2018
To make brewing more convenient / less time consuming
Joshua J T on May 15, 2018
because we can brew 7 gal batches
Dallas C on May 15, 2018
For pressurized fermentation
Brian S on May 10, 2018
Good reviews at a goodnprice
Steve Y on May 9, 2018
Good past experience with it
Jeffrey C on May 8, 2018
Best conical fermenter for the price, can easily buy 10 of these for price of 1 stainless 1/2 BBL conical
Ryan B on May 5, 2018
For husband's birthday. Upgrade over bucket and secondary fermenter.
Connie S S on May 3, 2018
Price and quality of the product
Ron B on Apr 30, 2018
Looked interesting.
Mitchel T on Apr 30, 2018
upgrade from carboys
Tim B on Apr 20, 2018
Online reviews
Jason M on Apr 20, 2018
I was looking to try a conical fermenter that didn't cost a fortune
Henry S on Apr 20, 2018
looks like a great product I can't wait to try it out
Robert R on Apr 18, 2018
streamlined secondary , kegging and bottling process
craig v on Apr 18, 2018
Overall value. I'm not quite ready to splurge on a stainless unitank , yet the Fermentasaurus will allow me to pressurize my beer by force. I'm also hoping the create a carb stone attachment for this device.
Michael Ferguson on Apr 16, 2018
Looks awesome! Great reviews, solves a lot of homebrewing issues.
Jason A on Apr 12, 2018
Timothy D on Apr 11, 2018
Starting brew, needed see thru fermenter
Pavel K on Apr 10, 2018
Great reviews and the 9.25g size.
Jon B on Apr 9, 2018
do the process in one fermenter- no transfering
LeRoy N on Apr 4, 2018
Saw a youtube video by short circuit brewing
Thomas V on Mar 31, 2018
To enhance my brewing experience!
Mark K on Mar 27, 2018
to up my brewing game
David J V a on Mar 23, 2018
Because I could carbonate and ferment in same vessel
Megan P on Mar 20, 2018
Seems like a good concept and has decent reviews
Michael D on Mar 20, 2018
Making mead!
Douglas D on Mar 20, 2018
Cuz it's good
Bradley H on Mar 16, 2018
Rcommended and can unitank
Andy M on Mar 16, 2018
To ferment beer under pressure
Jeremy E on Mar 16, 2018
Seeing a lot of home brewers using this and want to ferment under pressure in an way that won't break the bank.
Janett M on Mar 16, 2018
Size and price
William Aaron P on Sep 19, 2018
Least expensive means to pressure ferment.
Royal Merrill on Aug 10, 2018
Can this be used on a Fermentasaurus without damaging it?
Preston Hanson on Sep 19, 2018
Fermentasaurus Conical Fermenter - 9.25G/35L
Fermentasaurus Conical Fermenter - 9.25G/35L
The FermWrap™ Heater
The FermWrap™ Heater
BEST ANSWER: I use one with my fermentasaurus without any problems.
any video or instructions on cleaning the fermentasaurus especially the butterfly valve after use?
Frank Hruby on Mar 30, 2018
Can I use PBW to clean the fermentasaurus?
Matthew on Jan 13, 2018
BEST ANSWER: Yes, I’ve been using it to clean my fermentasouraus. There is no need to let it soak over night though because you are able to fit your arm and and in to gently rub the gunk off.
hello is the fermentasaurus capable to make a 7.5 gallon batch?
GERALD VAN DE HEY on Sep 24, 2018
BEST ANSWER: The most I've done is a 6.6G (25L) batch. I usually have +1 Gal in there for primary & secondary activities like yeast harvesting & dry hopping. That leaves just enough headroom for primary fermentation. Although I've had to use a blow-off for smaller batches (let out pressure before), and also get away with mitigating need for blow-off by allowing pressure to increase to 10 psi. I don't think I can push for a 7.5G batch given how little headroom would be left. However, if you don't use the pressure ferment, and can attach a blow-off then I'd say 7.5G batch size would be about the biggest to attempt. Depends on recipe & yeast.
Can I transfer the carbonated beer to bottles instead of a keg?
robert millar on Oct 16, 2018
BEST ANSWER: Hello Robert - Yes, but after carbonation it would be best to use a counter pressure filler.
Deluxe Counter Pressure Bottle Filler
Deluxe Counter Pressure Bottle Filler
Blichmann BeerGun™ V2
Blichmann BeerGun™ V2
I noticed that a redesigned valve is now available for this fermenter that has a larger opening. I am wondering if it comes standard with current purchases of this fermenter from your site?
Bill Kramer on Jan 4, 2019
BEST ANSWER: Hi Bill - The current out of stock Fermentasaurus that is located on our website does not have the larger opening.

4.6 / 5.0
50 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
What a great product
I already had 3 plastic fermenters 2 glass carboys and a racking bucket what do I need with this thing? OMG what a dunce, this fermenter is a jewel, everything in one vessel, only one bucket to clean, no transferring from one bucket to another. I GET TO WATCH THE PROCESS, I like to watch! Lighter than a glass carboy. Great sediment purger, did I mention I get to WATCH THE WHOLE PROCESS. Only one gripe, the hole at the top needs to be a bit larger so I can get my arm in past the elbow for a good cleaning. I need another so I can pressure one for tapping and then have the other for cooking another batch.
November 21, 2018
Great bang for the price
Have a batch of red ale going in it right now, only thing that o would change is the lid size to make it larger so it is easier to pour the wort into after it is cooled, plus the stand to be a little bit more steady and heavier.
First batch in the fermenter
First batch in the fermenter
October 23, 2018
9 months ago
Get One!
Gotta hand it to those Ozzys. Ferment Lagers warm under pressure. Dry Hop, add fruit without introducing O2. Transfer to keg under CO2 pressure. Beer never contacts oxygen again til you dispense it. Best of all the price is right.
October 13, 2018
10 months ago
not a big enough lower orifice
This works great as a fermenter, but the orifice at the bottom isn't large enough and the angle change in the bottom stops the trub from going into the trub dump. If there was a spigot 2 inches up on the conical, one could pull the beer off into a bright tank for finishing. Also, don't try and take it apart once assembled as you will break the lower mechanisms. I have two damaged ones that need parts.
October 1, 2018
1 year ago
Response from MoreFlavor
Hello Byron - We have found leaving the bottom dump valve open during ferment and giving the collection vessel a gentle squeeze, will get trub flowing quite well. As for reassembling the valve mechanism, it is crucial to pay close attention to the thread pattern, and keep everything straight.
October 11, 2018
Zach R Staff
Love this Fermenter
Doing my second batch. So far, no leaks or clogs. Eliminates the need to siphon into a secondary and to clean/sanitize the additional equipment. You can see your fermentation process as it happens. Cleaning is not hard. I close off the bottom, add some Oxyclean, hot water, put the lid on, the shake/swish. My hand fits inside, so I can get a sponge in to clean down the sides. Biggest issue - Carrying it down to my basement with 5 gallons of wort, as there are no handles on it.
September 24, 2018
1 year ago
Response from MoreFlavor
Hello Joseph - The stand has handles on it, with the help of a friend, a little less difficult to carry.
October 5, 2018
Zach R Staff
I transfered my wort into the Fermentasaurus and waited a few days to open the valve to get the trub out. That was 8 days ago and I am still letting trub out not to mention beer. It is my first time with this system so I am learning.
August 24, 2018
11 months ago
Response from MoreFlavor
Hi Galen - We feel your learning pains. With FE100 we have found it best to leave the valve open right from the start and throughout fermentation. Trub will settle into the collection vessel, along with yeast and many other particulates as they have higher mass. With patience you'll see the layers stratify and push good beer back into the fermenter. Every ounce counts...
September 7, 2018
Zach R Staff
I bought a 2nd as a gift
I preordered mine when they first became available. I have fermented too many times to count and always happy. Five stars of course but several times I did not tighten the tank to valve connection and had to tighten to stop drips. Not a problem, since once tight enough the leak stops. I now tighten another 1/8 turn beyond what I believe is tight and problem seems resolved.
Good size, easy to clean, pitching and removing yeast in the conical bottle make this superior to carboy bottles or buckets. A good step up for me after 30 years using carboys.
August 7, 2018
11 months ago
So happy with my purchase!
I got this with the pressure kit and a spunding valve, I set it around 8 PSI for all my brews. 6 brews and I haven’t had a bad batch, not having to transfer (reduced chance of bacteria and O2) and can move directly to a keg (reduced chance of bacteria and O2) the beer is sterile and never touches oxygen once I pitch the yeast.

It’s easy to clean (even after sitting for a few weeks after kegging)

My suggestion is just BUY IT!
August 1, 2018
1 year ago
Response from MoreFlavor
They really are novel little fermenters.
August 7, 2018
Zach R Staff
First brew in fermentasaurus
Great conical for the price. It is nice to be able to view fermentation. Only gave 4stars because the airlock wouldn’t seal. I realized the airlock hole is used for the pressure relief valve on the pressure kit and there is not a gasket to seal it. Did a hack on the lid to add a thermowell and an elbow for a blowoff tube.
User submitted image
User submitted image
July 28, 2018
1 year ago
Awesome and cheap compared to other options, buy it!
July 21, 2018
1 year ago