Sale & Clearance
Deal Of The Day
Fermonster Carboy - 6 gal. With Spigot
Accessories for your Fermonster
In Stock
Delivers to ( change ) by as part of our Fast & Free Shipping.
Faster Shipping Available. Details.
60 day no hassle return policy. Details

The Ported Fermonster is a brand new fermenter designed specifically for fermentation. MoreBeer! gave product feedback for over 2 years of development and we think they nailed the design. The large lid allows for easy filling and makes hop or oak additions a breeze. The smooth sides are fantastic for sanitization - no ribs or texture to collect yeast or bacteria.  The 6 gallon size is great for most fermentations, and the larger 7 gallon is available for even bigger beers. The punted bottom allows sediment to collect to the sides so that you can siphon liquid from the center.  Because they are made from vigin PET plastic they nearly unbreakable and a lot safer than similar glass carboys. Also notice the conical top which reduces surface area if you plan to store beer or wine long term.  

These ported versions come with our plastic spigot (FE347), allowing for easy racking and sampling!

Made from heavy PET plastic, the same material used in 2 L soda bottles, which is nearly impermeable to oxygen penetration.  Due to the thickness of the material and the overall geometry the Fermonster does not require ribs or dimples for stability.  That results in a super smooth interior surface that reduces yeast and sediment buildup making it the easiest to clean, most sanitary PET carboy on the market.  The huge 4" opening makes filling a breeze, and cleanup is as easy as wiping down the inside.  Fermonsters are easily moved by hand or consider using our Carboy Carrier for even greater ease of use.

These fermentors are completely air-tight and the lids sealed tight with an O-Ring.  Additional O-Rings and Lids both with and without holes are available for purchase, see our You Might Also Need items below.


  • 4" wide mouth carboy - easy to clean!
  • Ported version inlcudes spigot for easy racking
  • Food grade PET plastic construction is nearly impermeable to oxygen penetration
  • No hard to clean dimples or ribs
  • Volume Markers at 5 and 6 Gallons
  • Punted bottom for less sediment transfer during racking
  • O-Ring and Lid with one hole is included (Fits #10 Stopper)
  • Additional O-Rings and Lids available
  • Weight: 1.5 lbs
  • Temperature Limit: 140° F
  • Height: 19.25 inches
  • Diameter: 11.25 inches
  • Completely taste and odor free
  • Perfect for Beer, Wine, Cider, Mead, Kombucha or any other fermented beverage!
Item # FE256
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 2LBS
Community Q&A

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 1 question Browse 1 question and 11 answers
Why did you choose this?
MoreFlavor Store
Excellent Fermenter. This will be my second one.
Bruce H on Aug 14, 2018
Secondary Fermenter with no need to siphon
Justin D. K on Jul 19, 2018
Excellent Fermenter. This will be my second one.
Bruce H on Aug 14, 2018
i brew 5 gal batches
dan r on Aug 9, 2018
Secondary Fermenter with no need to siphon
Justin D. K on Jul 19, 2018
I have two of these carboys already. Want a third so I can get two 5 gallon batches going at the same time.
Andrew R on May 10, 2018
Like that it's sides are smooth
Bradley H on Apr 23, 2018
Tired of buckets
Keith m on Apr 11, 2018
secondary fermenter
Adam J. N on Mar 23, 2018
big mouth bubbler alternative
Don R on Feb 15, 2018
Kevin H on Feb 15, 2018
wanted a 2ndary with a spigot
Marie M on Feb 15, 2018
To use as a secondary fermenter
Todd C on Feb 1, 2018
i brew 5 gal batches
dan r on Aug 9, 2018
I have two of these carboys already. Want a third so I can get two 5 gallon batches going at the same time.
Andrew R on May 10, 2018

3.7 / 5.0
11 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Wall of the fermenter is too thin.
I bought two of these plastic fermenters.

The volume is ideal for a 5 gal brew and the large mouth is great for cleaning.

The plastic is very thin and one of the spigots is very difficult to open and close. It may improve once the parts wear.
September 10, 2018
2 weeks ago
They were on sale
They are a 6 gallon Carboy. But poorly made. On the side of the container there supposed to be stamped showing a 6 gallon and a 5 gallon level. But were not pressed enough to to show. And the lid gasket is a little too large to fit correctly.
I would suggest they go back to the drawing board and work a lot harder to put out their product.
August 23, 2018
1 month ago
Response from MoreFlavor
Hello Ken - On the product page, we offer a great video explaining these gaskets and their installation. I cannot speak for the volume markers. Please give us a call at 1-800-600-0033 or email us at info@moreflavor.com so that we can assist you. We are here to help. Cheers!
September 7, 2018
Zach R Staff
The O-ring DOES fit
While the O-ring for the lid is a little difficult to get in, if you watch the video on the product page that demonstrates installing it, the process is much easier and less frustrating. It really will fit, and after that it's an awesome product as a great price. The port really makes racking so much easier and the wide mouth opening makes cleaning a breeze.
July 3, 2018
2 months ago
Response from MoreFlavor
Thank you for your review William.
July 16, 2018
Zach R Staff
Fermonster is a good addition
Like the fermonster. Easier to move than glass, which I'd used exclusively for years. Have yet to utilize the spigot feature - have a brett pale going that's going to take a while until bottling. This one will be a dedicated sour/wild fermenter.
Seems the wide opening will make it simple to clean.
Had a slight issue with the rubber stopper staying in place on the lid, but easily solved with Teflon plumber tape.
Good addition to my supply of fermenters. Will get more.
February 4, 2018
8 months ago
Monster Fermenter
The o ring is little big, Needs a carrying handle.
January 14, 2018
8 months ago
Great product
The Fermonster was great. I found it easy to indtall the gasket and the spigot. Although the 4 inch opening is wide my arm could not fit to get the spigot in but my wife helped there. The seal was great. The bubler worked great and allowed me to monitor the fermentation process with ease. The entire thing cleaned up nicely after the 2 week fermentation time. I can't wait to get my next batch going.
September 13, 2017
Good overall fermenting solution.
I purchased 4 of each size of these. They are a good solution to broken glass and are a bit easier to handle with the accessory carrier straps. A must when handling nearly 45lbs of wort. Love the wide mouth for ease of cleaning. Yes , the stopper hole is way oversized (the company must have found a good deal on drill bits?) solution is to buy solid lids and drill to #7 yourself. Solved! Screw on lid can be over tightened, small strap wrench or oil filter wrench agin solves your He-man issue. Friend has Bubbler units w/ old style screw lids, they changed the lid style before I could purchase and these have been a great solution. Love them and would recommend them to anyone interested in a non-glass fermenting solution. Only have 4 stars because of the lid hole size and the O rings can be a booger to get seated.
June 16, 2017
Gaskets do not fit
I have been having one hell of a time trying top get these gaskets to fit. I've watched the video youve provided and it was useless. I have now even gone as far as to order new gaskets thinking maybe mine had stretched out. Nope, these ones don't work either. Anyone have this problem & been able to fix it? The wave in the oring doesn't go away just moves around the lid as I try to push it into the "track". As of now, I would not suggest these to anyone.
April 12, 2017
great product.
Using this product now, I love it. 2 things I wish it was a little thicker and it had handles or a carrier strap-harness, it works very well.The order was shipped very fast, the company was very knowledgeable to the few questions I had. Very pleased.
April 3, 2017
Not Sure Yet?
So the bottle itself is great. Nice wide opening so it should be very easy to clean, however if your arm is much over 13" in diameter it will be a tight fit. As of now I have not used this carboy yet because I am having Morebeer look into an issue with the lid. The hole in the lid is for a #10 stopper and not your standard #7. So the problem is how to use my thermwell that has a two hole #7 stopper. Furthermore, it is suggested that you use a Buon Vino style #10 stopper, others have noted that a regular #10 stopper has a tendency to pop out. Therefore it seems what ideally is needed is a Buon Vino #10 stopper with two holes if you want to use a thermwell. Anyway, I will wait and see what Morebeer has to say when they call me back. As of now my opinion is that this product may just need a V2 lid redesign perhaps like the one used on the Speidel Plastic Storage tank or a small hole with a rubber washer to slide the thermwell in? IDK
February 1, 2017