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LD Carlson

Fermonster Pet Carboy - 6 Gallon

Regular Price: $36.24
You Save $7.25
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This Fermonster is a brand new carboy designed specifically for fermentation. The smooth sides are fantastic for sanitation - no ribs or texture to collect yeast or bacteria. The punted bottom allows sediment to collect to the sides so that you can siphon liquid from the center. Because this carboy is made from virgin PET plastic it's nearly unbreakable and a lot safer than similar glass carboys. Due to the thickness of the material and the overall geometry the Fermonster does not require ribs or dimples for stability. Using a plastic material 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 6 gallon size is great for most home brew fermentations. The huge 4" opening reduces spillage and the need for additional equipment when filling or cleaning the Fermonster. The large lid allows for easy filling and makes hop additions as easy as ever. The conical top reduces surface area if you plan to store beer or wine long term. These fermentors are completely air-tight and the lids sealed tight with an O-Ring. Fermonsters are easily moved by hand, easy to use, and easy to clean.


  • 4" wide mouth carboy - easy to clean
  • 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
  • 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

  • Capacity: 4.755 US Gallon Max Capacity (4.25 Gallon to top line before bottle curves)
  • Material: Plastic
  • Plastic screw on lid with recessed cap
  • Breather cap can be used as an airlock or replaced with a #3 drilled stopper and an airlock
  • Strong nylon woven strap for easy carrying
  • Dimensions: 15.25"H x 10.5"W
  • Weight: 11 lbs

Note - The breather cap is now clear plastic, not black plastic

Fermonster Pet Carboy - 6 Gallon Reviews

Average Customer Rating:
(based on 1 reviews) 
Big mouth
by:Doug (04-14-2018)
Comments:Washing this car boy out before and after brewing beer is soooooooo easy and I love how light weight it is. As for drawbacks I have none since I'm only into my first batch of hopefully many with my big mouth.
Bottom Line:I would recommend this product.

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Item Qty Discount Price
Model: LD 5136
Availability: In Stock
Select Upgrade Options
Optional Accessories
Add Replacement Lid with Hole for 6 and 7 Gallon Fermonster +$4.49
Add Solid Lid for 6 and 7 Gallon Fermonster +$4.49
Add Replacement Fermonster O-Ring +$2.49