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Catalyst Fermentation System


SKU# 43166

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If you could eliminate one chronic homebrewing time-suck, what would it be? How about the Transfer Trap…You know, where you endlessly shift your homebrewed beer from fermenter, to secondary to bottling bucket, to bottles, risking contamination and messy spills at every step.

The great news is, you can. There’s a better, simpler way: The Catalyst – an ingeniously designed fermentation system from Craft-A-Brew that separates sediment, eliminates transfers and allows you to bottle straight from your fermenter. Available now, exclusively from Northern Brewer.

The Catalyst’s tank is made from Tritan™, a food-safe, BPA-free polymer. This revolutionary material retains the same clarity and smoothness of glass, but is resistant to shattering. It is more durable and outlasts the other types plastic typically used in homebrewing. You can even put it and the removable silicone gasket in your dishwasher for easy cleanup. Properly cared for, the tank will last for years to come.

With The Catalyst Fermentation System, it’s easier than ever to make great beer at home…and look good, AND save time, AND…what are you waiting for? Escape the Transfer Trap and learn some better brewing moves today.


Availability: In stock

Catalyst Fermentation System

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  • Catalyst Fermentation System
  • Catalyst conical fermenter includes all parts nessessary
  • Catalyst Specs
Product Details
Smiley faceAs if that time-and-space-saving solution weren’t enough, here are the three things that put The Catalyst over the top as absolutely best-in-class:

The Materials: The Catalyst’s tank is made from Tritan™, a food-safe, BPA-free polymer. This revolutionary material retains the same clarity and smoothness of glass, but is resistant to shattering. It is more durable and outlasts the other types plastic typically used in homebrewing. You can even put it and the removable silicone gasket in your dishwasher for easy cleanup. Properly cared for, the tank will last for years to come.
The Design: The Catalyst is engineered to optimize ever cubic inch of space, resulting in an incredibly sturdy stand with I-beam and honeycomb construction, squat 6.5 Gallon tank and 3” Trub Trap™ Butterfly Valve – the largest in the industry. The result is an efficient, practically indestructible system that fits easily under a table or on a countertop.
The Details: No specialized equipment required. The Trub Trap™ on The Catalyst is designed to work with any large-mouthed mason jar, which makes catching and storing viable yeasts or separating sediment super simple.
With The Catalyst Fermentation System, it’s easier than ever to make great beer at home…and look good, AND save time, AND…what are you waiting for? Shake off the Transfer Shuffle and learn some better brewing moves today.

The Catalyst Fermentation System Includes:
  • 6.5 Gallon Tank with Lid
  • Stand (Base, 2 Legs, 2 Support Beams, 8 Screws)
  • 3” Proprietary Butterfly Valve
  • Bottling Attachment
  • Transfer Tubing
  • Tubing Clamp
  • Rubber Stopper
  • 16 Oz. Wide Mouth Mason Jar
  • Allen Wrench
  • The Stand: Height: 14.75" Width: 17" Depth: 13.75"
  • Unit Size: Total Height (does not include airlock): 26.25" Maximum Width: 17"

Add the Catalyst Tank Cover for ultimate functionality and ease.
Additional Information
Support Documents: No
3.7 / 5.0
42 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Good idea, but some flaws
I bought one at NHC this year and just started using it. The biggest issue is the seal on the lid. It comes off very easily when removing the lid and is almost impossible to put back on. I had to transfer my first beer out to a bucket as I couldn't get the lid seal back onto the lid. This is going to limit my use, I hope the seal is redesigned to be more user friendly.
October 14, 2016
I love this system!
I just dumped the trub on my first batch using the system. I don't have a ton of room in my apartment so having multiple carboys and buckets has always been a hassle. This has eliminated all the headache. I siphoned the beer straight from the kettle to the catalyst and pitched the yeast. No drips leaks or anything. Today primary was done and I switched the jar out to collect the yeast. No issue, just make sure you have a small plate to catch the liquid that sits on the top of the jar. If you are brewing a heavier beer I would suggest a 24-32oz jar as the 16 fills up quickly. I purchased those two and the first batch has settled nicely into the 24. The only CON I have seen is the lid latches. They have to be aligned right as they are cut to fit around the top so just make sure its aligned press firmly to seal then secure the latches. Fantastic product and you can see pics on Instagram texaviator23
October 14, 2016
Great concept, needs work
Pro/Con list at end of review.

Got this setup for Christmas this year.
Overall, I think I am going to love it. Easy to use, great quality, item that does what it was advertised to do: Brew beer while lessening the potential instances for contamination.
I love the system, don't get me wrong. But it needs quite a bit of additional design work/modification to make it a five star item.
I am an early adopter, so I am accustomed to 1.0 version items I get having a few slight "flaws". Again, overall, the system is a superior fermenting system.
There are a few things requiring a little tweaking, in my opinion. Most are simple ease of use issues, but I do have a major issue with the design of the bottling attachment, which is the reason I only give it 4 stars rather than 5.
The screw-on attachment for the tubing to bottle the finished batch is very very slim and will not work with standard 3/8 tubing (and yes, in a hobby like this, I recognize there are no hard and fast "standards"). Normally, I don't think this is that big of a deal, but bottling out of this system is gravity feed/kink the hose and waste beer only: SLOW and messy. I was able to force my bottling wand into the skinny tube that fits the bottling attachment, but only because my wand is old and starting to show signs of crazing. Normally I don't use a wand in that condition, but I consider myself to be lucky I hadn't tossed this one yet since none of the others I own would fit.

Overall, I love this thing. I will continue to use it. I will probably buy another just for ease of use... but it needs a little work to meet the 5 star mark in my book.
Superior concept
Easy to assemble and use
High quality materials
Complete package

Tall system makes filling with water to sanitize a challenge
Threading on lower valve is the same direction for both trub jar and fermenter attachment
72 degree temp limit will not allow ice cooling method
Bottling attachment tubing too small for bottling wand
Lid seal difficult to re-install in a sanitary manner
Lid too large to fit inside of fermenter necessitating separate sanitization vessels
Clear fermenter has no light blocking ability
No safe way to handle/carry just fermenter section.
January 15, 2017
4 months ago
Good idea, well executed.
Once you think about it, the design is a no brainer. It takes most of the headache out of home brewing, and does it solidly, simply and elegantly. Would definitely recommend.
October 19, 2016
Great with little tweak
I received the catalyst fermentor as a Christmas gift. I brewed my first batch and 2 weeks later tried to empty the trub but could not. I had to transfer beer into a secondary unit. I contacted Northern Brewer and was told that the valve needs to be left open during the process so I tried another batch. What a difference. Customer service was great and i got back on schedule using the new fermentation system. Love it. My only gripe is that the manufacture should make the instructions clearer about the position of theh valve.
January 27, 2017
4 months ago
I got mine yesterday and was immediately impressed by its appearance and construction. Putting the stand together was a dream. Everything lined up perfectly and was rock solid. I smiled broadly as I thought about getting rid of all those ugly buckets and siphoning gizmos. And my schedule won't be wrecked by racking! Thought I was in brewing heaven. Then, I decided to attach the lid to make the job complete. Smile now gone! I followed the directions and used an X pattern. I managed with difficulty to get the first three to lock in place, but I worked up a sweat trying to get that last one. Finally, I used all the force I could muster, and the latch broke. I'm now hoping I can get a replacement lid without having to buy another fermenter. If all goes well, I'll re-review in a couple weeks and hopefully add that fifth star.
December 8, 2016
Not Bad but could use some upgrading
I recently received this system for Christmas and used it for the first time today. In general it is a pretty well built system but the lid needs changing. First, if the rubber liner on the inside comes out good luck trying to put it back in. Unfortunately mine broke trying to re-assemble after cleaning. I also do not like how the lid attaches to the fermenter. If these two things can be fixed I think overall it will work out just fine. I am in the process of fermenting now so I will try to update later and maybe increase the number of stars if I find it easy to bottle.
December 28, 2016
4 months ago
Primary Fermenting Now
We brewed a brown ale this past weekend and have it fermenting in the Catalyst now. The review about the seal easily coming off the lid is true, but it was not difficult to put back on with two people. Transferred straight for the kettle to here. Pitched yeast and two people shook the entire system by rocking back and forth. Although the complete construction is plastic, the base, valve, and "carboy" seem very sturdy. Using a 20oz wide mouth jar to catch the trub.
December 19, 2016
Great System & Major Time Saver
I've just used my Catalyst Fermentation System for the first time and I love it. All in all, this thing has saved me hours of time that I used to spend transferring from primary to secondary and secondary to bottling buckets (and all associated cleaning). It's also improved the quality of my beer because far less opportunity for aeration and/or contamination.

Before I bought it I read tons of reviews and was a bit wary about a couple apparent issues with it but after use I feel that the concerns stated in negative reviews are non-issues for me. One concern was about the lid and seal. The lid is not hard to close, it makes a great seal which is necessary. The inner gasket does pop out sometimes when removing the lid but it needs to pop out so it can be cleaned. It is easiest to replace it with a bit of help from a second set of hands. I do recommend using a larger mason jar than what comes with it as I generally have more trub than can be held in the stock jar.

The only negative comment I have is that when removing and dumping the first jar of trub to initiate secondary fermentation a large slug of air is introduced to the wort when you open the valve. This can be avoided by pre-purging your mason jar with CO2 if you have the capability.

Other than that this is a great time saving system and I plan to purchase another.
February 22, 2017
3 months ago
Overall good, but with reservations
I have used the CFS twice with mostly good results. I agree with the first reviewer that, if you lift the lid, the lid gasket loses its position on the thin inside rim onto which it fits for a tight seal. It isn't possible to realign/reinstall without cleaning the gasket and lid before repositioning (leaving beer exposed). Fitting an airlock with hose for blowoff worked the first time, but on my second brew the blowoff also oozed through the side of the lid and onto the floor. Even though the gasket was in position, the lid clamps don't all grip and lock down with equal pressure. Lastly, while the dump valve is awesome, it seems that the plastic surface of the conical, while hard, allows for yeast further up the slope of the conical to stick to the surface and not fully purge. I'm still committed to making my investment work, but am beginning to believe that stainless steel is the only way to ensure that you're working with a foolproof non-transfer fermenter.
December 25, 2016
6 months ago
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Browse 27 questions Browse 27 questions and 44 answers
I see that you include transfer tubing with this. Where do you hook the transfer tubing up? I don't see a spigot anywhere. Do you have to siphon this to bottle the contents or is there an attachament point around the butterfly valve somehwere?
A shopper on Nov 24, 2016
BEST ANSWER: There is a plastic piece that looks sort of like a funnel that screws into where the mason jar screws into. You connect the tubing to the bottom of the funnel. It comes with a crimper to start and stop the flow. I use the crimper and my bottling wand.
How do you aerate the wort with this system? Currently fermenting with buckets and shake them vigorously before pitching.
A shopper on Dec 9, 2016
BEST ANSWER: I use this as a secondary to get all the trub out, I would still use a carboy or bucket as the primary.
WIll there be too much head space foe a 3 gallon batch?
A shopper on Dec 3, 2016
BEST ANSWER: Of course this will hold up to 6 gallons. However, head space is a relative issue. Once fermentation begins it will create a blanket of CO2 over the wort. So, oxidation isn't going to be an issue. If sanitation is done well, then you shouldn't have any issues with contamination.
Since I don't have the luxury of a dedicated, heated, brew space, I have to haul the primary fermentation vessel to a different location to ferment after filling. How do I move this container? Are there sturdy handles that allow me to move it easily?
A shopper on Dec 31, 2016
BEST ANSWER: I'll answer my own question, no handles to grab at the moment but it appears that there is a "new" cover that has straps that allow for transport due out the end of January 2017.
How is fermentation temperature measured and controlled?
A shopper on Dec 18, 2016
BEST ANSWER: I use a thermowell and probe. Works fine
Can I make wine in this system? I am new to wine making and this seems like a good deal. Thank You
A shopper on Dec 27, 2016
Can you use a heating belt to control fermentation temperatures with this product?
A shopper on Dec 8, 2016
BEST ANSWER: Yes. I am using a heating belt and it works fine. It doesn't fit snug around the tank due to its shape but it still does the trick.
Will this fit in a small chest freezer. I have a small chest freezer that easily holds two carboys. Anybody?
James R on Nov 27, 2016
BEST ANSWER: If your chest freezer inside dimensions are larger than those stated it should work.

The Stand: Height: 14.75" Width: 17" Depth: 13.75"
Unit Size: Total Height (does not include airlock): 26.25" Maximum Width: 17"
Are the lid, gasket, and valve dishwasher safe? Or just the tank?
A shopper on Jan 17, 2017
BEST ANSWER: The tank and bottling attachment are the only items that have been tested and proven dishwasher safe.
How do you get any yeast that clings to the walls of the fermenter off before bottling?
Ford S on Jan 14, 2017
BEST ANSWER: its so minimal it wont matter and if it stayed there during drop-out it likely wont end up in the bottles, but u can remove the lid and DELICATELY rub the sides of the conical with the trub trap closed, then put the lid back on and open the trap again then wait a couple hours (or a day). as good as it gets
Can I drill it for a sampling port?
A shopper on Dec 26, 2016
Will the rubber stopper or lid support two "holes" one for gas/pressure relief and one for a thermowell for fermenter temp control?
A shopper on Dec 29, 2016
how do you get the gaket back in?
Wayne C on Jan 7, 2017
BEST ANSWER: The gasket is a bit of a pain because it sometimes skips off loose the flang or plastic ridge. There is a groove under the gasket that fits over the plastic ridge on the lid. You need to fit the gasket over that ridge and gradually slide your finger along the gasket while holding the gasket from sipping off. Kind of like a bicycle tire and rim thing. Practice it a few times. If you have fresh wort in the fermenter when this happens figure out some way to cover your vulnerable wort while you fuss with gasket. The manufacturer should improve this feature by gluing the gasket in place or otherwise secure it better.
When cold crashing does any yeast stick to the sides of the cone? I like the idea of this product but am concerned that transferring from the bottom of the cone will still wind up with yeasty beer and require a secondary to settle out.
A shopper on Nov 30, 2016
BEST ANSWER: What I do is a day before transferring out of the fermenter, I shake it side-to-side to encourage excess to fall into the mason jar. Since the gas layer on top is entirely CO2 this won't result in oxidation. When the transfer happens some yeast will stick to the sides, but it will stay there through the transfer, creating a clean transfer to keg or bottling system. When I cold crash and lager I transfer to a secondary anyway so that I can use the fermenter again during lager.
Are spare parts available?
A shopper on Apr 27, 2017
BEST ANSWER: At this time, the manufacturer has not made spare parts available in quantities to sell them on their own, but that is the goal. If parts wear or tear through use, we should be able to help - just call customer service to see if they can be sourced! The parts are very durable very few have had any issues needing replacement parts.
How do I change my jar? Close valve, remove jar and replace worth new sanitised jar and open valve again?
Doug M on Dec 26, 2016
BEST ANSWER: Yes. Just like that. But remember every time you change the jar a big gulp of oxygen hits the beer as the jar fills.
I'm assuming that if this can be used for beer and wine, it should be suitable for hard cider or pretty much any other fermented beverage. Am I correct?
A shopper on Mar 1, 2017
BEST ANSWER: This is true! You could ferment beer, wine, cider, mead, etc, in such a fermenter, and it will offer many of the same advantages. Fewer transfers, less cleaning and siphoning, easy clean-up, etc. -Mike W, Northern Brewer
Has anyone attempted to drill the catalyst fermenter to add a sampling port? I was thinking I could bottle off the sampling port as well rather than using the provided bottling attachment.
Matthew F on Jan 31, 2017
BEST ANSWER: No, you will definitely run the risk of shattering the fermenter, I would also think it would reduce the structural integrity. It's plastic, not stainless.
Does this still use an airlock and stopper? If so is it included? Or will it accept the standard size stopper and airlock?
A shopper on Jan 20, 2017
BEST ANSWER: Yes utilizes an airlock. Stopper. provided, but you will need your own airlock
What is the size of the tube hole? So i can put a bottle filler on the end of one
A shopper on Dec 18, 2016
BEST ANSWER: if you soak it in hot water first, its a tight fit tho
Is this product good for the " No chill method " HDPE construction?
A shopper on Dec 11, 2016
I have several brews that require a blow off tube. I use a one inch i.d. tube in a glass carboy and the almost always have krausen in the tube and into my blow off container. Was wondering how this system would work with a vigorous fermentation?
steve f on Nov 26, 2016
BEST ANSWER: The same size blow off tube fits! The gasket makes a perfect seal and the lid secures very tightly so the blow off hose you use will work the same!
Doesn't the beer get dirty bottling right from the catalyst, especially after mixing the priming sugar?
A shopper on Nov 26, 2016
BEST ANSWER: Hi there,
You'll wait until all the matter settles in the mason jar and dump it before you bottle.Cheers!
Will the BeerBug work with the lid of the Catalyst Fermentation System?
A shopper on Dec 9, 2016
when you mix the priming sugar, doesn't the residues stuck to the sides of the fermenter also mix?
A shopper on Nov 27, 2016
Hello! Should the Catalyst have any issues utilizing a heating unit like a brew belt or heater wrap? Will this hard plastic transfer temperature effectively? Will a sticker thermometer work? Thanks!
John H on Nov 27, 2016

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