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Big Mouth™ Modular 5 Gallon Keg

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Big Mouth™ Modular 5 Gallon Keg

SKU: 42500

Free Shipping on Orders Over $125

Regular Price: $210.99

Special Price $139.97



The first-ever collapsible keg!

Introducing the first keg purpose-designed for homebrewers. The Big Mouth™ keg packs the power of a draft system into a revolutionary serving system. A 5 gallon keg that can be completely broken down for deep cleaning. If you need a portable solution, take out the Expansion sleeve for a compact and portable 1 gallon keg. Slide it in your fridge. Pop it in a cooler. Share, anywhere.

  • 5 Gallon size is perfect for full-size batches
  • Withstands up to 40 psi of internal pressure
  • Completely breaks down for easy cleaning
  • Collapses to 1 Gallon Size when needed for portability
  • Crafted from heavy, long-lasting 304 SS

When the party is over, Big Mouth™ completely disassembles to fit in a dishwasher. Effortlessly clean every nook and cranny.

Modularity means more than just a cleaner, more sanitary keg. It’s collapsible and offers both 5 Gallon and 1 Gallon sizes in one keg. Use the 5 gallon size when you’re doing bigger brew days, and collapse back to 1 gallon for keeping beer in your fridge or party-ready portability.

Equipped with a revolutionary access port for easy flavor additions. Hang a hop bag or oak spiral from the included hook to customize any batch. Plus, the smaller port means easier sealing and less chance of oxidation.

Collapse it. Clean it. Customize it. The Big Mouth™ Modular Keg is designed for sharing premium homebrew at its prime, from the first batch to the five-hundredth.

We recommend a 7/16" wrench or deep socket for tightening the V-Band Clamp.

Kit Includes:

  • Keg Top & Keg Base
  • 2 V-Band Clamps
  • 2 Silicone Center Gaskets
  • 5-gallon center sleeve
  • Dip Tube

Needed, but not included, is a CO2 cylinder, Regulator, and Ball Lock Gas and Beverage lines.


Full Keg with Extension: W: 11" with V-band; H: 26"
Mini-Keg Only: W: 11" with V-band; H:11"
Extension Only: W: 11" with V-band; H:15"

Also sold in a 1-gallon size.

Details & Instructions

Additional Information

5.0 / 5.0
1 Review
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Haven't used yet.
Should be easier to clean.
January 18, 2016
Customer Q&A
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Browse 4 questions Browse 4 questions and 3 answers
How tall is this in both configurations?
A shopper on Feb 12, 2017
Will there be a 2.5 gallon extension available?
S I on Dec 2, 2015

We currently only have the 5 gallon expansion. I do not know of any plans to make a 2.5 gallon available.
Does this have dip tubes for both 5 gallon mode and 1 gallon mode?
O F on Dec 2, 2015
BEST ANSWER: Greetings!

Yes, this kit comes with both dip tubes.
Is it possible to make this a 9g keg with another expansion?
Jeremy W on Nov 27, 2015
BEST ANSWER: Unless you got a different dip tube that is long enough. I do not believe a dip tube long enough is manufactured. I hope this helps! Cheers! James J.

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