Carboy Rubber Stopper

Carboy Rubber Stopper

$1.99
A reusable #6.5 rubber stopper designed to create a secure fermentation seal for 1 gallon carboys, airlocks, and blow-off tubing setups.
  • #6.5 rubber stopper for home fermentation
  • Fits 1 gallon carboys and Catalyst Fermentation System lids
  • Compatible with airlocks and blow-off tubing
  • Pre-drilled 3/8" opening for fermentation accessories
  • Reusable brewing and fermentation component

This rubber stopper is compatible with:

  • 1 gallon glass carboys
  • Craft a Brew 1 gallon kits
  • Extra Fermenter Kit
  • Catalyst Fermentation System lid
  • 3-piece airlocks
  • Hex airlocks
  • 5/16" transfer tubing

The stopper helps create a sealed fermentation environment while allowing CO2 to safely escape through an attached airlock or blow-off tube.

  • #6.5 Carboy Rubber Stopper

This brewing stopper is ideal for:

  • Homebrewers
  • Winemakers
  • Mead makers
  • Hard cider brewers
  • Kombucha brewers
  • Small-batch fermentation setups

To use, insert the stopper into a compatible fermenter opening and attach an airlock or blow-off tube through the pre-drilled center hole.

  • Size: #6.5
  • Material: Food-safe rubber
  • Hole Diameter: 3/8"
  • Compatible With: Airlocks, blow-off tubing, 1 gallon fermenters
  • Reusable: Yes
Carboy Rubber Stopper
$1.99

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