FastFerment 3G Conical Fermenter

Product: 20-15166-00

Availability: In stock


Following the success of their 7.9-gallon fermenter, FastFerment has designed a smaller fermenter that offers the same advantages for 3-gallon brewing. The smaller size is perfect for making 1 and 2 gallon batches with plenty of headroom for beer with even the most aggressive fermentation. Shaped to imitate the conical fermenters seen in breweries. The high-quality HDPE plastic is lightweight, translucent and much less expensive than its stainless-steel counterparts, while delivering the same benefits. The design reduces exposure of the brew to oxygen so you can consistently produce high-quality batches of beer and wine.

The wide top makes adding ingredients and cleaning this fermenter easy. The collector at the bottom allows sediment to gradually fall, so that you can perform both primary and secondary fermentation in the same unit. There is no need to spend the time and effort required to transfer to another bucket or carboy. You will also not need to clean and sanitize more than one container. This saves significant time, effort, and space. You can even harvest the yeast for use in future brews.

Another feature new to the 3-gallon fermenter is that the stand is included, and replacement 4 oz. or 8 oz. glass mason jar collectors can easily be purchased from a variety of retailers. Fully assembled, with the airlock included, the unit is 11” wide and 26” tall.

Guaranteed to produce better quality and consistent batches with less hassle for a lifetime of brewing!

For assembly video, click here.

Contents and Specifications:

  • 3G food grade HDPE conical fermenter
  • Union valve – 3/4” with coupling
  • Hose barb – 3/8”
  • Mason jar – 4 oz.
  • Mason jar adaptor & gasket
  • Metal stand – 11”w x 15”h
  • 3-pc. Airlock
  • Plumber’s tape
  • Bottling hose – 3/8” x 12”
  • Hose clamp
  • 6” screw top lid and gasket
  • Grommet


Note: If you are brewing with a Mr. Beer recipe that calls for Muslin Hop Sacks, be sure to leave them out of the brewing process. They can clog your FastFerment.

  1. Remove the yeast packet from under the lid of the can of Brewing Extract, then place the unopened can in hot tap water.
  2. Using the cleaned measuring cup, pour 4 cups of water into your 3-quart or larger pot. If Booster Pack is included, add slowly while stirring into cool water until dissolved. Bring water to a boil, and then remove from heat.
  3. Open the can of brewing extract and pour it into the boiled water. Stir until thoroughly mixed. This mixture is called “wort”.
  4. With the bottom valve all the way open, fill the fermenter with cold, refrigerated water to the 1-gallon mark. TIP: For best results, use bottled spring water or charcoal-filtered tap water between 40° - 60°F.
  5. Pour the hot wort into the fermenter, and then bring the total volume of the fermenter to the 2-gallon mark by adding more cold water. Mix vigorously with the spoon or whisk.
  6. Sprinkle the entire yeast packet into the fermenter (do NOT stir), then screw on the lid and attach the airlock. Fill the airlock with water up to the line.
  7. After 5 days, close the valve and remove the collection jar from fermenter. Discard the sediment (called “trub”) from the jar, then clean and sanitize ONLY the glass jar in boiling water for a few minutes and replace onto the fermenter. The valve, coupling and mason jar adaptor cannot be put in boiling water and must be sanitized using a sanitizer. Open the valve allowing the jar to fill with beer and continue the fermentation period.
  8. Once you are ready to bottle, close the valve and remove the collection jar from fermenter. The contents of the jar, which will mostly be yeast, can be discarded or saved to ferment a future batch. If saved, put a lid on the jar and refrigerate right away until use. This yeast may be used for up to 4 weeks after refrigeration.
  9. After removing the jar, screw on the barbed hose adapter with 3.8” hose attached for bottling or kegging. You will use this hose to transfer your beer into bottles or kegs for carbonation.

To reuse your harvested yeast, simply pitch into your next batch by pouring the contents from the collection jar into the fermenter when it calls for yeast.

FastFerment 3G Conical Fermenter is rated 4.4 out of 5 by 16.
Rated 5 out of 5 by from A step up from the LBK I am in the middle of my first batch using the 3G conical fermenter (10th Mr. Beer batch overall.) First off, a couple of suggestions. Make sure that you perform a couple of leak tests (I had to wrap the thread tape around 18 times total.) Also, make sure that you know how the gasket just above the mason jar sits because if it is not sitting properly there will be liquid I emptied the mason jar after the first week and the secondary fermentation has started thus further clarifying the beer. Overall, this is a welcomed addition to my brewing experience and I am considering the larger unit for my 5 Gallon batches.
Date published: 2018-03-11
Rated 5 out of 5 by from Best fermenter I've used I'm actually amazed at how long it took for a product like this to come out. One thing of note is that because every beer is different, there are times when removing the trub will need to be done more than once. If it isn't removed in a timely fashion, it can cause a clog in the ball valve. That's not really an issue if you anticipate it and just let gravity do its thing. I always put a cookie sheet under the trub jar when removing because it will get a little messy. The trub jar also makes for a great place to put secondary fermentation additions such as fruit, oak barrel chips, etc.
Date published: 2018-01-21
Rated 4 out of 5 by from Great product but bottling system needs work I just ran a second beer (Dry River RyePA) through this and was generally pleased. Fermentation seems faster and its generally easier and neater to use than the LBK. Two notes, though: 1) When emptying the trub after ~5 days of fermentation, be ready for a mess. You might want to do this in a sink or at least spread a towel under it. Most of the trub will be in jar but a significant amount will glop out when you unscrew the jar. You also have to clean it a bit to reinsert the o-ring. Not a problem, just something to be ready for. Ditto when you pull the jar at the end of the fermentation, but not quite as messy. 2) The clamp on the bottling hose is problematic. It's hard to press the clamp just right to stop the flow. I wasted more than I would have liked. I'm running Vlad the ImPale Ale through it now and it's fermenting hot & heavy.
Date published: 2018-01-08
Rated 4 out of 5 by from Great piece of equipment. Have been looking for small fermenter for a while to replace my selection of small buckets and jars. After seeing the pre-pre-sales introduction almost a year ago I was waiting for this 3G fermenter to be available and as soon as there was a pre-sale announced I placed my order. I am glad I did. Having now fermented two batches with 3G I am happy to say it has fulfilled my expectations pretty well. Easy to use, fits nicely on top of my kitchen counter and collects the yeast to the jar - no need for transferring the liquid goods to secondary. Few notes though: The volume markings on the side were almost invisible. I had to highlight them with a permanent marker. Instructions noted about eight rounds of the tape should seal the valve thread. It took me 30 rounds before no leaks. I assume both of these minor issues are benefits of an early adopter of the product and I am sure these will no longer be issues as soon as the molding of the plastics has been fine-tuned in production. The small piece of hose was way too short for my purposes and the material of it too hard and thin. I simply replaced it with a piece of silicone hose. Overall I like this fermenter a lot. Being able to collect the yeast to any standard size jar is a big plus and the easiness of transferring the beer to my mini kegs after jar removed makes the process smooth, hygienic and oxygen free.
Date published: 2018-01-22
Rated 5 out of 5 by from Makes Brewing a Lot Less Messy I am still in the middle of brewing my first batch with the FastFerment 3G Conical Fermenter. So far, I'm both impressed and pleased. That being said, there is nothing easier to brew with than a Mr. Beer football-style fermenting tank, but the FastFerment takes some messiness out of the process. I love it that I can dispose of the spent yeast by simply unscrewing the glass jar at the bottom of the fermenter. A couple of challenges I experienced or foresee: I wanted to take a hydrometer reading. This was not as easy as with the Mr. Beer tank--doable, but not as easy. Second, when I bottle I'm going to want to use a bottling wand. I'm not real fond of FastFerment's technique of attaching a hose with a clamp to stop the flow of beer in the bottle. I think I'll be able to use a bottling wand, but that is yet to be seen. That aside, I am a big fan of the FastFerment Conical Fermenter.
Date published: 2018-01-19
Rated 4 out of 5 by from It has great potential.... I have one of these 3G fermenters purchased from Mr. Beer as soon as they were available. I have only run 2 batches through it but I think that I am going to like it a lot. I like the easy of dumping trub. I like the single fermentation. I like the shape. The size is great for small batches. The dislikes are minor and most can be solved inexpensively. I didn't get any activity in the airlock and I guess this is common. I know that you don't need it and getting gravity readings is a better gauge of fermentation but watching and hearing the bubbler is gratifying. On the third batch, fermenting now, I took the suggestion from another website and used Teflon tape on the threads for the lid. My airlock is now working. I too thought that the hose for filling bottles was too short and replaced it. The new hose is too stiff and the shut off clamp isn't working. So I am going to try adding a bottle filler with a shutoff on the tip. And, once while draining the ball jar I lost the "O" ring that seals the connection. My wife found it in the garbage disposal. Finding an "O" ring that has "square edges" is tough but I found a regular round "O" ring at a local hardware store that fits, seals, and actually stays in the connection when dumping the jar. And, finally, the fermenter pivots in the stand when you are trying to open and close the big red valve handle. It isn't a big problem but it would be nice if there were some molded protrusions on the sides of the fermenter to keep it from swiveling in the stand. I would appreciate suggestions as to how I can stabilize it. All in all, a winner IMHO.
Date published: 2018-02-07
Rated 2 out of 5 by from Clear Beer, But Poor Quality Flow Valve I have used this for 2 batches. First batch the fermenter worked perfectly as advertised. The beer had much less sediment. Second batch, when I went to empty the jar, the flow valve leaked. When I turned off the flow (to empty jar) beer leaked thru the valve (internally). I will attempt to troubleshoot the problem once I bottle the remainder of the existing batch. If unsuccessful, I am considering going to a bucket with lid or an Igloo cooler.
Date published: 2018-08-24
Rated 5 out of 5 by from This fermenter is awesome. I bought this fermenter a few weeks back and it is been great. I ran a batch of bewitch amber ale through it and as come out excellent I have it bottled waiting to drink. I also have a 7.9 fastferment and I like the 3-gallon better because of the Mason jar on the bottom it's easier to deal with. I dumped the Mason jar twice in the first 5 days and when it's time to bottle I have clear beer in bottles.
Date published: 2018-01-18
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