8 Gal Conical Fermenting System by Brew Demon

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Big Demon’s  8 Gallon Conical Fermenter with 6 Gallon Brew Capacity.

Why chose amber over clear?  Some say that amber blocks the dangerous UV rays – great if you’re brewing outside. Not a problem in the house. The best answer for me is that it blocks neighbors and friends from seeing what you’re doing!.  And when you offer them a drink and turn around to draw one off – there still standing there. Not so much if you’re brewing in glass or clear plastic. Although the clear plastic does allow ME to see what’s happening …

We love the conical brewing containers. Wider at the top than at the bottom makes a better Kombucha and Vinegar ferment.  While fermenting Beer, Wine, Cider, Mead, Jun and Water Crystals just fine.  Definitely makes Continuous Brewing much easier and makes for a clearer glass of brew. 

All the Brew Demons are Phthalate and BPA free PVC plastic. Leaves no odor or flavor to your brew. Its all on you if your ferment goes off.  

For me the best thing about the Conical Fermenters is that the sediment and sludge falls and collects neatly on the bottom-- away from the spigot. Thus when you draw off a glass it’s cleaner and clearer. Nice you don’t have to clean the spigot as often.  When to bottle, the sediment is settled on the bottom. No tube or fumbling to keep the tube off the sediment. Just turn the spigot slow and on low to RACK your brew. No need to filter. Depending upon the filter, filtering may collect more yeast, but it also adds more oxygen and restarts  a Second Ferment. Even with Second Fermenting yeast sediment (trubs or lee’s) is not all that desirable.

The advantage over the smaller Brew Demon’s 3 Gallon brothers, besides the volume, is that Big Demon (and the Fast Ferment 7.9 Gal Fermenter) have a Collection Ball, or value, that you can easily remove the sediment without disturbing the

ferment. This sediment or trub is just mainly yeast. High in vitamins and minerals. Many brewers use this to start another batch. Or dry out and supplement their diet or their pet’s diet. 

These conical fermenters really make brewing easier. Keeps the sediment away form the ferment, easy large mouth openings and recyclable yeasts!

Height in inches.  28 1/2  tall x 13 1/2  wide.  Legs 13 1/4


  • 8-Gallon Conical Fermenter
  • Fermenter lid
  • Fermenter base (includes 13 inch legs)
  • One inch  food grade spigot
  • Adjustable Flow Tap Assembly
  • Venting Plug, no airlock needed
  • Dump plug
    • Teaded Street Elbow (1" MFNPT)
    • Basic Ball Valve (1" FNPT)
    • Barbed Elbow (90 deg. 1" NPT x 1" HB)
  • roll of plumbers tape (for dump plug) 
  • stick on Temperature Strip
  • Cloth and rubber band 
  • 70 page Kombucha 3.0 brewing guide included.

Additional Details

BigDemon 8 Gal

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