On Orders Over $30

Text Us 952-260-4404

6.5 Gallon Plastic Big Mouth Bubbler®

More Views

6.5 Gallon Plastic Big Mouth Bubbler®

SKU: U41965

The revolutionary Big Mouth Bubbler® Plastic is a virtually indestructible fermentor, equipped with 3” thick anti-flex ribs, a punted bottom and decreased base diameter for extreme strength and durability. Its smaller footprint preserves precious brew cave space and allows for convenient storage inside a standard brewing bucket.

Original Price:   $34.99

From: $34.99

To: $135.66

Price as configured: $0.00

Big Mouth Bubbler Plastic - 6.5 Gallon   ($34.99)

Free Shipping on Orders Over $30

* Required Fields

Price as configured: $0.00



Purpose-designed from head to toe, Big Mouth Plastic features improved strength and durability through a decreased base diameter, punted bottom and 3” thick anti-flex ribs. Equipped with a taller body and smaller footprint, Big Mouth Plastic is ultra-storeable, fitting easily inside a standard bucket to take up less precious brewing space. Constructed from food-grade PET, Big Mouth Plastic features gallon graduation marks for instant volume measurement, plus a punted bottom to efficiently settle out yeast and promote crystal-clear finished fermentations. And, of course, its revolutionary wide mouth eliminates glugging and enables hands-on cleaning for a faster, cleaner clean. Finally, get your hands wet.

The new Big Mouth Universal Lid (included) fits all Big Mouth Bubbler® Fermentors, and has ribbed silicone rings ensure a completely air-tight seal. Upgrade to a dual-port lid plate for continuous thermowell monitoring in one port to sustain constant ideal fermentation temperatures and take gravity readings without ever removing the lid.

Earth-conscious design. We have thoroughly planned out every last feature of this innovative product, right down to it’s physical construction. After untold amounts of research into the properties of PET plastic, we fanatically chose to make the Big Mouth Bubbler™ with as little plastic as possible while still maintaining a high degree of structural integrity and brute strength. What does this all mean? It means that the impact to our planet Earth is as minimal as possible. We call this a win-win situation. Check out the Plastic Big Mouth Bubbler™ for yourself. You will never go back to a traditional style carboy again.

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

You will also need a Small Universal Carboy Bung (not Included) - drilled or solid.

The Carboy Dryer is compatible with the Big Mouth Bubbler® when used in an inverted position.

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

VIDEO Big Mouth Bubbler™ Plastic Fermentor

SKU 41965

Details & Instructions

Additional Information

3.9 / 5.0
53 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Lid Seal ISsues
The Big Mouth Bubbler fermentor has a really difficult time keeping the lid on. The lid just pops off, I tried wiping with paper towels on the lid and the gasket, but it continues to press out of the mouth. I got a bungee cord and 2 gallon jugs, one on each side, and strapped the lid down, and it has stayed since. This will not be able to be used as a primary fermentor, the risk of blow off on an active fermentation is too great.
September 18, 2016
Worked Great - Until it Failed
I purchased my 6.5 gallon plastic Big Mouth Bubbler back in June of 2014. I've been using it as my primary ever since. I've had great success using it for this purpose, until this last brew day.Made a very nice DIPA and filled BMB to 5.5 gallons. While placing into my fermentation chamber (chest freezer), the plastic failed and a large crack ran from the bottom edge 1/2 way up the side. As you can imagine, this was a big loss and very messy. Entire batch (just after pitch) went spilling into my freezer (good thing as it would have spilled out onto the floor otherwise). An extra 2 hours of cleaning followed... oh joy. Lost a batch and even more cleaning than normal. Lovely.While it was nearly 2 years old, it was used as intended and was cared for properly from the start, so it shouldn't have failed. I'm over these thin plastic fermenters. While it was nice to have a light weight fermenter, it isn't worth the potential loss. Very disappointed.
April 18, 2016
Still has lid issue.
Just put my first batch into this, and really like the overall size as well as the "Big Mouth". But the lid just pops off within 30 seconds. I tried every method I could think of to seat the seal rings into the opening, but it always worked its way off. Finally had to tie it down. If I had time, I would have cleaned out one of my older fermentors and just transferred the batch over. I've not seen this problem in 20 years of brewing, and I won't be using this fermentor again.
September 28, 2016
Love the opening size, hate the new universal lid!
The opening makes cleanup easy and allows for easy access with thief or syphon. The original screw top lid worked great. However, the newer pushin lid keeps popping out and as it does so it creates a vacuum that draws the water from within the airlock into the bottle, possibly contaminating the brew. This is only a problem until the CO2 pressure builds up but I worry that with a grain heavy beer, the entire lid may blow off. Get the old lid if you can!

Also the wall thickness of the bottle varies greatly so some spots feel like I can put my thumb through the side in one spot. Some of my bottles are worse then others.
January 8, 2017
Plastic Big Mouth Bubbler 6.5 Gallon
I liked this okay but I am not happy with the fact that the lids will not seal !_x000D_I had a blow off tube but I never got any bubbling like I do on a normal carboy. _x000D_I could never get a good seal on this unit, I tried everything no luck. I hope my batch is not ruined. The plastic is a little too thin and the carboy is hard to pick up, you will need to get a carrier if you order this.
May 25, 2015
I've had a lot of fermenters. Cheap ones, expensive ones. One thing that big mouth has that keeps me going to it over my other fermenters is it works. My expensive fermenter is nice in that it's conical shape makes separating trub from wine effortless. But degassing is not so easy. bubblers work. And are a snap to clean. Just be sure to use microfiber cloth so you don't scratch it.
April 17, 2017
1 year ago
Follow Up
I have only one complaint about this product. There are three rings that are dimpled to look like bubbles. These dimples are on the outside as well as inside the Big Mouth. When cleaning you need to make sure you get into those dimples with your rag or sponge. If the insides were completely smooth cleaning would be easier. Otherwise this is my new favorite fermenter and I'll probably order another soon.
June 2, 2014
Good but hard to move
I really like the design and price, but it's hard to pickup and move and because it's plastic if you squeeze the middle it can push liquid out the top. Overall though it's good, just need to order the strap carrier
July 27, 2014
Just what I needed...
Picked up another one of these and a bottling bucket spigot, melted a 1-inch hole in the carboy with a soldering iron, and Bob's your uncle. Now I've got three ' siphonless' Bubblers.
January 4, 2016
Lid not secure, otherwise a nice compromise between bucket and carboy.
Compared to a glass carboy: lightweight and won't shatter.
Compared to a bucket: clear so you can see when yeast has dropped. The wide mouth makes cleaning easier than traditional carboys and I like that it's graduated in gallons. The availability of ready made accessories is nice as well.

The surface is not smooth/straight. I assume this is done for added strength, but yeast likes to settle in the grooves. Lightly tapping the sides gets a great deal of it to drop off, but still not ideal. The major problem is that the lid does not stay in place. The advice to make sure the gasket and carboy are dry to get a good seal helps a little, but doesn't help once fermentation is rolling. I put small dumbells on the lid to keep it place which works well, but not ideal.
August 19, 2017
Customer Q&A
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 8 questions Browse 8 questions and 23 answers
Are they BPA and or BPS free?
J A on Mar 31, 2016
Does the big mouth bubbler have a gasket for the lid?
A shopper on Feb 9, 2017
BEST ANSWER: No, there is no gasket included for the lid. It does loosen a slight bit during fermentation, which causes the airlock to lose pressure, but the brew continues just fine. I tighten the lid every other day and it pressurizes the airlock fine.
Can you place it inside a standard fermenting bucket to move it around when full, instead of the specialty designed strap.
D B on Apr 1, 2016
BEST ANSWER: This is not recommended. The Big Mouth Bubbler is slightly too wide to fit wholly inside the bucket.
What size cork/stopper does this take?
A shopper on Mar 17, 2017
BEST ANSWER: These carboys will take a "small universal stopper" ( SKU 7081 ) or a #6.5 stopper ( SKU SD65 ). -Mike W, Midwest Supplies
if you put in 6.5 gal, does that fill it all the way to the top of does that leave some headspace?
A shopper on Aug 14, 2018
BEST ANSWER: The top mark(line) is 6 gal. If you go 1/2 gal past that its only to the top of the curve, or bottom of spout. It still gives you a little room
What are the outside dimensions?
K S on Aug 9, 2016
BEST ANSWER: They are about 11" in diameter and about 22" tall (without the airlock).
Used vanilla in secondary and I cannot get rid of the smell, how do I clean this?
Chris T on Jul 7, 2018
What is the diameter of the mouth?
Duane W on Mar 9, 2018

Call Us 888-449-2739

Text Us 952-260-4404

Please wait...

Your selected product has been added to your Cart.

Continue Shopping Go To Cart