Airlock Fermentation Replacement Grommets for Fermenter Lid – 20 Pack Grommet Fits 1/2 Inch Hole, For Standard 3/8 in

Key features

• Fermentaholics Fermentation Grommets: These rubber grommets are designed to hold all 3/8 inch standard-sized airlocks, including 3-piece, Double Bubble, and S-style airlocks, and keep firm in place on fermenter lids for secure, sealed fermentation. Can also be used to seal blow-off tubes, tubing, or straws when dimensions are compatible.
• Airtight Compression Seal: Creates a tight seal between the airlock stem and fermenter lid to allow CO₂ to escape during fermentation. Proper half-inch hole size is required for an effective seal. Large 20-pack is ideal for setting up multiple fermenters or keeping replacements on hand.
• Compatible With 1/2-Hole Fermenters: Suitable for use on plastic bucket fermenters, lids, and any drilled vessels used for beer, wine, cider, and other anaerobic fermentations with a half-inch hole lid. Need a DIY fermentation lid? Use a 1/2-inch drill bit to drill a hole in a lid you already have on hand.
• Easy Installation: Simply press the grommet into the hole by hand; the airlock stem inserts directly into the grommet with no tools required. Proper hole size is required for an effective seal.
• Durable Flexible Material: Made from a resilient rubber that maintains elasticity with repeated use and cleaning under normal fermentation conditions.

Fermentaholics Airlock Fermentation Replacement Grommets are designed to securely hold standard fermentation airlocks in place on fermenter lids, creating a reliable seal during fermentation. Each grommet fits a 1/2 inch hole and is compatible with standard 3/8 inch airlocks, including 3-piece, Double Bubble, and S-style airlocks commonly used in homebrewing. These fermentation grommets create an airtight compression seal between the airlock stem and fermenter lid, allowing CO₂ to escape during fermentation while minimizing oxygen exposure. Proper half-inch hole size is required for an effective seal. In addition to airlocks, the grommets can also be used to seal blow-off tubes, tubing, or straws when dimensions are compatible. Suitable for use with plastic bucket fermenters, fermenter lids, and other drilled vessels, these grommets work for beer, wine, cider, mead, and other anaerobic fermentations. If you need a DIY fermentation lid, simply drill a 1/2 inch hole into a lid you already have on hand and press the grommet into place. Installation is straightforward and tool-free after drilling. The grommet presses into the hole by hand, and the airlock stem inserts directly into the

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