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Big Mouth™ Modular Keg 5 Gallon


SKU# 42500

The first-ever expandable keg!

Standard Shipping Rates Apply to this product
Introducing the first keg purpose-designed for homebrewers. The Big Mouth™ keg packs the power of a draft system—and then some—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
  • Withstands up to 40 psi of internal pressure
  • Completely breaks down for easy cleaning
  • Collapses into a portable 1 gallon size when needed
  • Crafted from heavy duty 304 Stainless Steel to last a lifetime

Modular Keg Instructions

Modular Keg Expansion Kit Instructions

Also available in a 1 Gallon size!

Availability: In stock

Big Mouth™ Modular Keg and Expansion Pack Kit

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  • Big Mouth™ Modular Keg and Expansion Pack Kit
  • Big Mouth™ Modular Keg and Expansion Pack Kit
  • Big Mouth™ Modular Keg and Expansion Pack Kit - Mini Keg
  • Big Mouth™ Modular Keg and Expansion Pack Kit - Mini Keg
  • Big Mouth™ Modular Keg and Expansion Pack Kit - Expansion Piece
Product Details
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 versatile; offering both 5 gallon and 1 gallon sizes in one keg. Start with the 5 gallon keg when you’re kegging on normal brew days, or collapse back to 1 gallon for keeping it 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.

Kit Includes:

  • Modular Keg - Keg Top & Base
  • 2 V-Band Clamps
  • 2 Silicone Center Gaskets
  • 5-gallon Expansion sleeve
  • 2 Dip Tubes: Long for 5 Gallon, Short for 1 Gallon

Needed, but not included, is a CO2 cylinderRegulator, and Ball Lock Gas (KX03) and Beverage (KX05) lines.

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


Full 5 Gallon Keg with Extension: W: 11" with V-band; H: 26"
1 Gallon Mini-Keg Only: W: 11" with V-band; H:11"
Extension Only: W: 11" with V-band; H:15"

Also available in a 1 Gallon size!.
Additional Information
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