Double Bubble Airlock

The Double Bubble Airlock is a fermentation essential, offering a simple and reliable way to monitor activity and protect your beer, wine, or other fermenting beverages. Its dual‑chamber “bubble” design allows carbon dioxide to escape safely while preventing outside air, bacteria, and wild yeast from entering your fermenter.

Made from durable, easy‑to‑clean plastic, this airlock fits standard stoppers and bungs and provides clear visual feedback—letting you watch fermentation progress in real time. Whether you're a homebrewer or running a professional operation, this airlock delivers consistent performance and dependable protection for every batch.

Perfect for use with carboys, buckets, demijohns, and other fermentation vessels, this tool remains a trusted favorite across the brewing industry.