The Catalyst Fermentation System


Get the top-rated The Catalyst Fermentation System from Craft a Brew. Our industry-leading conical fermenter for home brewing has several innovative features, and is made from the finest materials. We designed The Catalyst Fermentation System to redefine what a conical home brewing fermenter could be, while being easy to use and durable. Make your own beer, wine, mead, and more using the Catalyst Fermentation System.

What's Inside the The Catalyst Fermentation System

  • 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

Key Features Of The Catalyst Fermentation System

Conical tank with 45˚angle
Includes a proprietary 3” butterfly valve. The largest in the industry
Silicone gasket with multi-surface contact to ensure a perfect seal
All steps in one vessel: Primary, Secondary, Harvest Yeast and Bottling
6.5 gallon capacity
Strong and durable stand, designed with I-Beam and honeycomb structure
Our Trub Trap™ is compatible with any wide mouth jar
Dishwasher Safe

How To Use The Catalyst Fermentation System

Innovative Materials

The Catalyst Fermentation System's tank is made from Tritan®, a medical-grade, BPA-free, polymer. This food-safe polymer is the highest quality used in a fermenter, providing the clarity of glass with the durability and convenience of plastic. This material acts as an excellent barrier against oxygen, making our tank 93% more scratch-resistant than other plastic fermenters. It is dishwasher safe and withstands temperatures of up to 230º Fahrenheit.

The Trub Trap consists of a 3” butterfly valve, and is compatible with any wide mouth mason jar, so you can remove kettle trub and fermentation trub, pitch a yeast starter, harvest yeast, and bottle without disturbing, or oxidizing that precious beer.

Overview: The Catalyst Fermentation System

Kettle Trub (Pre-Fermentation)
Use a 24 oz. mason jar to catch trub, hops and other pre-fermentation sediment, then discard it by closing the valve and unscrewing the mason jar.
Yeast Starter & Primary
Use a 16 oz. mason jar as a yeast starter, attach and open the valve to pitch. Leave the jar attached to collect all of the primary fermentation trub.
Secondary & Yeast Harvesting
Use an 8 oz. mason jar during secondary to catch all of your viable yeast and refrigerate for later use.
Our bottling attachment makes bottling easier than ever. Just screw on the included transfer funnel, attach it to the transfer tubing and open the valve. Let gravity do all the work, down to the last, perfectly clear bottle of beer.

Our Guide To Brewing & Fermenting With The Catalyst Fermentation System

A step-by-step guide to brewing, fermenting, and bottling your beer.

What Our Brewers Are Saying