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Big Mouth Bubbler 6.5 Gal Plastic Siphonless Fermenter with Harness

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Big Mouth Bubbler 6.5 Gal Plastic Siphonless Fermenter with Harness

SKU: 42903

The most helpful fermentor ever invented just got even better. Less effort. Better, clearer beer. Don’t just cut out the hassle of cleaning, cut out siphoning altogether! Porting this revolutionary fermentor makes transferring as easy as the turn of a valve. No extra equipment, no extra cleaning, just a sanitized fermentor.

Now Including our Universal Harness for lifting, transporting and ensuring your Big Mouth Bubbler lid stays in place during even the most intense fermentations.

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The Siphonless Big Mouth Bubbler® isn’t just easier to use. It’s better for your beer. Fight oxidation and contamination by keeping your fermentor closed for transfers. Never open the lid to insert an auto-siphon, just turn a valve and you’re set. Best of all, you’ll have clearer beer. Gently rack liquid from the spout into secondary without disturbing the trub.

Make your brew day easier and your beer better with the siphonless Big Mouth Bubbler®


  • Ported Big Mouth Bubbler® Plastic Fermentor
  • Universal Harness for Big Mouth Bubbler
  • Spigot
  • Single Port Universal Lid*
*The new Big Mouth Universal Lid (included) fits all Big Mouth Bubbler® Fermentors, and has ribbed silicone rings ensure a completely air-tight seal.

You may also need:

Important Note: Do not fill any Plastic Big Mouth Bubbler® fermenters with very hot liquid - temp should not exceed 140 degrees Farenheit (60 celcius)

BIG MOUTH BUBBLER® Product Specifications:
Capacity:5 gallon6.5 gallon
Height (w/lid, closed):22"23"
Fermentor Material:PETPET
Details & Instructions

Additional Information

4.9 / 5.0
18 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
My second
I use the big mouth bubbler for secondary fermentation and have found it makes racking simpler and more efficient. After using one bubbler for my 2019 batch, I immediately ordered a second to rack from one to the other as many times as required; next year. Very pleased with the product.
October 15, 2019
1 month ago
Plastic big mouth bubbler siphonless
Lightweight with a nice harness that fits any big mouth bubbler also very easy to dry hop because of the big mouth!
September 28, 2019
1 month ago
Easier than a glass carboy
This bubbler was easier to clean and lighter in weight than my glass carboys. I plan to buy another.
August 19, 2019
3 months ago
It’s outstanding!
August 16, 2019
3 months ago
It’s a lot easier to use. Still fermenting but spout should work fine
August 15, 2019
3 months ago
Great deal been away for a while easy way to get back into brewing. Made my first batch its in the keg.. waiting..hope for the best...a cream ale...
July 18, 2019
4 months ago
I love it!
Wine racking has gotten so much easier! Thinking about getting a couple more!
July 14, 2019
4 months ago
The ?? knees
My favorite fermenter by far out of plastic and glass
Super easy to clean
July 13, 2019
4 months ago
Welcome addition to my homebrewing tools.
I have only used it once, but so far so good. Very easy to use and clean.
July 7, 2019
4 months ago
Works great. Love the harness
July 7, 2019
4 months ago
Customer Q&A
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Browse 2 questions Browse 2 questions and 17 answers
Is this for primary and secondary for wine, eliminating the usual racking?
A shopper on Aug 8, 2019
BEST ANSWER: I haven’t had it long enough yet to try it that way. The last wine I made started in a fermenting bucket and finished in the big mouth bubbler. If I started it in the big mouth I’d probably rack it into my other big mouth bubbler I bought two at once.
Any drawback in using a 6.5 gal fermenter for a 5 gal batch?
A shopper on May 30, 2019
BEST ANSWER: I've used the 6.5 gallon big mouth bubbler for 6 separate 5 gallon batches and love how easy it is to move around with it's harness. The harness also prevents the top from popping off. The wide mouth makes it super easy to clean too.

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