2 Piece S‑Shape Air Lock — Twin Bubble Plastic Grommet for Homebrew Fermentation (Wine & Beer) Keep your fermentation controlled and hygienic with a simple, dependable airlock designed for homebrewers. The S‑shape twin‑bubble design allows fermentation gases to escape while maintaining a liquid barrier to help reduce the risk of contamination. Compact, easy to use and easy to clean, this airlock is a practical accessory for small batch wine and beer making. Key benefits Controls pressure release: lets CO2 escape during active fermentation so pressure does not build up in the fermenter. Helps protect your brew: the liquid barrier formed by the twin chambers reduces the chance of airborne contaminants or insects entering the fermenter. Easy to maintain: 2‑piece construction disassembles for quick cleaning and sanitizing between batches. Simple to install: designed to work with homebrew fermentation setups that accept a grommet or stopper feed‑through. Key attributes Design: S‑shape twin bubble airlock with two chambers for improved liquid seal and visual fermentation indication. Construction: durable plastic for lightweight handling and repeated use. Configuration: 2‑piece design (separable and base) for filling, cleaning, and sanitizing. Accessory: includes a plastic grommet to provide a sealed pass‑through into your fermenter. Use: suitable for homebrew fermentation of wine and beer and other small‑scale fermentations. How it works (simple steps) Assemble the two pieces, fill the lower chamber with a small amount of sanitized water (or sanitizer solution) to create the barrier, and push the grommet and airlock into the fermenter's opening. During fermentation, CO2 escapes through the S‑shaped path while outside air is blocked by the liquid seal. Typical applications / use cases Home wine fermentation: Use during primary or secondary fermentation to vent CO2 from carboys, demijohns, or fermenting buckets while protecting the wine from exposure. Home beer brewing: Install on fermenter lids or stoppers to allow active krausen off‑gassing without letting airborne particles enter the vessel. Small batch fermentation projects: Ideal for mead, cider, kombucha starters or experimental batches where a compact, reliable airlock and grommet solution is needed. Practical notes The 2‑piece S‑shape airlock is easy to disassemble for cleaning and reassembly between uses. Fill the chambers with a small amount of clean, sanitized liquid to form an effective barrier before fermentation begins. Store dry and clean when not in use to maintain long service life. A straightforward, functional accessory for homebrewers who want a compact, effective way to control fermentation gases while reducing contamination risk.