FermZilla Flat Bottom Fermenter | Gen 1 | 7.9 gal. | 30 L

FermZilla Flat Bottom Fermenter | Gen 1 | 7.9 gal. | 30 L

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The FermZilla Flat Bottom Fermenter is an excellent option for making all kinds of beverages, from beer and wine to kombucha and cold brew coffee. It's compact, lightweight, and made of brilliantly smooth PET. The extra-large lid opening makes it easy to get your arm inside and scrub the walls clean after use. The Flat Bottom features the same lid as the Conical FermZilla's, so installing accessories like a thermowell or Temp Twister Cooling Coil couldn't be easier.

Why MoreBeer! loves the Flat Bottom FermZilla:

  • Super smooth PET makes cleaning very easy.
  • Tight-sealing lid and PET material make for a better oxygen barrier than fermenters made of HDPE.
  • Lightweight and easy to move around, yet strong enough to be considered shatterproof.
  • The 4.75" lid opening makes it easy to get your arm inside and clean after use.
  • The lid is designed for the easy installation of accessories such as a thermowell or cooling coil.
  • Affordable! The Flat Bottom is one of the most affordable plastic fermenters in this size range.

What's Included:

  • FermZilla 30L Flat Bottom Fermenter
  • 3-Piece Airlock
  • Adhesive Thermometer
  • Adhesive Voume Marker


  • 30 L (7.9 gal) Total Volume
  • Temperature Rated to 122°F
  • Height - 18.5"
  • Height w/ Airlock - 22.5"
  • Tank Diameter - 13.75"
  • Lid Ports - 28 mm PCO 1881 threads


Please note: The Flat Bottom is not pressure rated and was not designed to carbonate in. For this reason, the lid does not come with a PRV like that which is included with the Conical FermZilla. The tank can withstand approximately 2 psi, but beyond that there is risk of deforming and damaging the tank.

Kegland Part number: KL14755
Shipping Limitation: This item does not qualify for free shipping.
Item # FE145
Shipping Does Not Ship Free
Availability California - In Stock
Pennsylvania - In Stock
Weight 4 LBS

Community Q&A

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Browse 3 questions Browse 3 questions and 8 answers
Why did you choose this?
MoreFlavor Store
Scott M Parker on Nov 30, 2022
right size and I like viewing my ferment.
Derrick M on Jan 22, 2022
Scott M Parker on Nov 30, 2022
did not have one
Valued C on Mar 14, 2022
right size and I like viewing my ferment.
Derrick M on Jan 22, 2022
Like to see the process
John s on Oct 15, 2021
Brewing large batches of kombucha
Carey Jenkins J on Aug 12, 2021
I have a good rack, this meets my needs for both beer and mead.
Daniel F on Jun 21, 2021
Valued C on Apr 30, 2021
The size, nothing extra, simple fermenter
Jay on Apr 1, 2021
Height and lid for thermowell
Henry T on Mar 10, 2021
Alejandro B on Mar 1, 2021
I love the style
Rich on Feb 9, 2021
Plastic, sealable (exclude O2), fits in fermentation fridge
Nathan K on Jan 4, 2021
I already own one and love it. Easy cleaning and easy to carry. Firm body
Valued C on Jan 1, 2021
Big enough for what I want
earl h on Dec 11, 2020
Good price and made of Glass
ANTHONY E on Dec 11, 2020
My other one busted
Shaun J on Oct 15, 2020
I like the system and the fact I can use pressure to keg.
Jack on Sep 15, 2020
It looks like a simple solution to complicated task
John on Sep 9, 2020
looking to move from glass
TD on Aug 27, 2020
I like the price. I like the shape. I like the material. I trust the brand.
John L on Aug 13, 2020
Read reviews
james b on Jul 27, 2020
Like the larger capacity for energetic celebrations and lighter weight and durability of plastic over glass. Also really like the wide opening for cleaning..
Louis LeBlanc on May 21, 2020
Have the basic bucket, a conical polyethelen fermenter (when sediment is an issue), and various carboys. The wide mouth and multiaccess cap make cleaning and monitoring much easier. Not so concerned with sediment.
John B on Apr 7, 2020
Like large mouth
Robert F on Mar 13, 2020
size, price, company reputation
JeffD on Feb 24, 2020
Fits perfectly inside my temp controlled refrigerator.
Andrew Obeso on Jan 22, 2020
did not have one
Valued C on Mar 14, 2022
Like to see the process
John s on Oct 15, 2021
Can a spigot be added to this fermenter?
Eric Beckemeier on Mar 11, 2020
BEST ANSWER: A hole can be drilled and a spigot may be added to this fermenter. You will want to be careful that the drilled hole is smooth and free of coarse edges and that the spigot has a good rubber washer fitted tightly.
Will the hole in the lid fit a #7 stopper?
Scott Jordan on Jul 27, 2020
BEST ANSWER: no, the middle hole fits the air lock stem. nice snug fit, no problems with it. the air lock comes with it too
Does the pressure kit work with this? I just want to do closed transfers.
Adam Lowery on Mar 1, 2020
BEST ANSWER: Hi Adam - The flat bottom is not pressure rated and not designed to withstand pressure. The tank can withstand approximately 2 psi, but beyond that there is risk of deforming and damaging the tank.

4.3 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 4 out of 5
Good - but read this first
Love the wide opening, temperature range, size - everything. Super easy to clean. The volume scale is super handy too.

Two things to think about:
1 - the lid is extremely difficult to remove if you don't use some keg lube on the o-ring. This is not provided and caused me some pain on the first batch.
2 - It is pretty awkward to carry when it's full as it's heavy, large and kinda "squishy" and malleable. There is a newer model that has handles built into the lid - wish I had bought that one instead.
February 14, 2023
1 year ago
Rated 5 out of 5
I love this thing.
It's a great fermenter. Well made and well engineered.
January 30, 2022
over 2 years ago
Rated 4 out of 5
Good but can be phenomenal!
It has no spigot that’s tbe only down side, it with be everything if it has one!
User submitted image
It works well.., but would make this a phenomenal unit, a spigot! 
That’s the down side
March 9, 2021
over 3 years ago
Rated 5 out of 5
Works great
I bought two of these fermenters and are very happy with the purchase. I like the wide mouth and the screw top lid.
November 18, 2020
over 3 years ago
Rated 4 out of 5
the lid is GREAT
I like it lots, you need the handle. jug is thin but tough
August 26, 2020
over 3 years ago
Rated 5 out of 5
Great alternative to glass carboys
Much easier to manage than a 6.5 gallon carboy, but only with the steel handle - don't even bother to try without the handle. Like others have said, it really should be included.
Cleanup is a breeze with the wide opening and shorter depth.
It has plenty of head space for high krausen without a blow off tube. Clear bulkhead makes it easy to watch the yeast dance during fermentation, but you probably want to wrap it with an old towel or shirt
July 28, 2020
over 4 years ago
Rated 4 out of 5
It is a nice fermenter. Fermentation started fast, clean up was a breeze. Definitely order the handle when purchasing this fermenter.
April 6, 2020
over 4 years ago
Rated 3 out of 5
Decent fermenter
I jut finished my first batch in this fermenter. I brewed a standard 5 gallon batch and I've only used fermentation buckets to this point. My first issue was that my fine mesh strainer did not fit the opening like it does my bucket so I wasn't able to strain my wort like I normally do to remove hop particles. This was a minor inconvenience and I already have a work around for my next batch. My next problem was from the lack of a handle. I had to pretty much bear hug this thing, full of wort, and carry it through my kitchen, down steps, and through my basement to get to my storage area. I see that they make a handle but come on, the cheapest fermentation solution is a 5 gallon bucket that comes standard with a handle!!! Can you imagine if you had to pay extra for a handle on a bucket. Plus I have young children so we have gates everywhere. With a bucket and handle I can still open gates. With this thing I had to "clear a path" and then come back through and close gates. The last issue I had was when I went to check my FG. I do the shortcut method of dropping my sanitized hydrometer in to the fermenter. This thing wasn't deep enough to do that. The hydrometer bottomed out.

Now for what I did like. It was great to finally be able to watch my beer through the fermentation process. I did slide an old T-shirt over it to block light when I wasn't checking it. The lid opened easily when it was time to rack it, unlike the finger ripping that is required to pull the lid from a bucket. The lid has some future expansion built in so I can move my temperature probe to a thermowell when I'm ready. Cleanup was a breeze. The curved shape of the bottom made it easy to spray out the trub. A quick soak in my basement laundry sink and it was clean. It actually seemed to fit in the sink for cleaning better than my bucket.

I won't be pitching my fermentation bucket anytime soon, but I will be using this for my next few batches so I can keep an eye on things.
February 3, 2020
over 4 years ago