Brewland 6 Packs 3 Piece Airlocks for Fermenting with #6 Stoppers and Grommets Review (2026)

Who this multi pack fits

Brewland's kit bundles six three piece airlocks with four number six drilled rubber stoppers and eight silicone grommets, which is aimed squarely at brewers who run more than one fermenter at a time, whether that means several one gallon jugs, a couple of glass carboys, or a bucket fermenter fitted with a drilled lid. Having six airlocks on hand also covers the common homebrew problem of a stopper drying out, cracking, or getting lost between batches, so a new batch is never held up waiting on a single part. Brewers who only ferment one batch at a time and already own an airlock will find this pack overkill, since most of the six will sit unused in a drawer.

How the parts fit together

The number six stopper included in this set measures roughly 32 millimeters at the top and 26 millimeters at the bottom, which is the standard taper that fits most one gallon jugs and narrow neck glass carboys sold for homebrewing. The silicone grommets are sized for a half inch drilled hole, which is the common size used in bucket fermenter lids, so the same airlock body can move between a drilled bucket lid and a stoppered carboy depending on what a brewer is fermenting that week. The three piece airlock itself is the classic S shaped bubbler design, made of two nesting plastic pieces plus an outer cap, which lets carbon dioxide escape during fermentation while keeping airborne contaminants out of the fermenter.

Cleaning and everyday use

Because the airlock breaks down into three separate pieces, it is easy to pull apart for a thorough scrub with a bottle brush or soak in sanitizer solution, which matters since dried krausen and residual sugar can otherwise build up inside the chambers and become a source of infection. Before use, brewers typically dry the stopper and the inside of the carboy or jug neck so the stopper does not slip, then fill the airlock chamber to the marked line with sanitizer or plain water so it can do its job of letting gas escape while blocking oxygen, dust and insects from getting back in. With six airlocks in rotation, one set can sit in sanitizer while another is already in use, which speeds up bottling and brew days when time matters.

Where it falls short

The number six stopper size is the main limitation of this set, since some five and six gallon glass or plastic carboys use wider necks that call for a larger number seven or number eight stopper, so buyers with big carboys should measure their neck diameter before ordering. The three piece airlock design is also more prone to sucking sanitizer or liquid back into the fermenter during a cold crash or a sudden temperature drop compared with the simpler S shaped or one piece airlock styles, which is a known trade off of this style rather than a flaw specific to this brand. Competing three piece sets from other sellers offer similar counts of airlocks, stoppers and grommets at a similar level of quality, so this pack is a solid but not standout choice within its category.

Bottom line for multi batch brewers

For a brewer juggling multiple fermenters or who simply wants backups on the shelf, this six pack delivers enough airlocks, stoppers and grommets to cover both carboy and bucket setups, matching our score of 8.6 out of 10 for fit and value. The number six stopper size and the three piece design's tendency to backflow during rapid cooling are the two things to plan around rather than reasons to avoid the set. Anyone with wide neck carboys or who prefers a spill resistant airlock style during cold crashing should check stopper size first or consider an S shaped airlock instead.

Frequently asked questions