FastRack Three-Piece Airlocks with Number 6.5 Stoppers, Three Sets
Compare the cylindrical three-piece airlocks with number 6.5 stoppers for a different construction and bung format.
Read the differences ↗FastRack · Airlocks & vessel parts
FastRack Twin-Bubble Airlocks with Universal-Style Bungs, Two Sets
Two S-shaped water airlocks and two tapered carboy bungs for adding a visible liquid-seal vent to a compatible vessel.
Price & purchase ↓
The equipment in use
How this item fits your brewing setup
The twin-bubble format lets you see liquid in two connected chambers as fermentation gas passes through the airlock. It is a useful comparison if you prefer an S-shaped body to a cylindrical airlock with a removable inner float. Choose by that construction and by the connection to your vessel, rather than by the shape alone.
The selected package contains two clear airlocks and two universal-style carboy bungs. The tapered bung is the interface to the vessel opening; the airlock stem fits its drilled hole. A bucket with an existing small grommet may instead receive an airlock stem directly, so check which connection your lid or carboy actually uses.
The supplier instructs you to fill the airlock with water and keep its cap fitted during use. The liquid seal is part of the operating setup, not a permanent dry plug. Visible bubbles indicate gas passing through that setup; this is not a calibrated pressure gauge or a hydrometer for measuring the liquid.
Compare the cylindrical three-piece set if access to separated airlock components matters when choosing equipment. For a replacement bung, match the actual opening and stem connection rather than relying on the word universal. Confirm the full installed height if the fermenter must fit under a low shelf.
The selected reference
Specifications & supplied details
- Airlock form
- S-shaped twin-bubble chambers
- Package
- Two airlocks and two carboy bungs
- Airlock body
- Clear plastic, supplier description
- Bungs
- Tapered universal-style
- Vessel connection
- Bung fits vessel; stem fits drilled hole
- Operating liquid
- Water, supplier instructions
- Cap
- Keep fitted during use
- Brand
- FastRack
Before and during use
Advice for this reference
Before you choose
Check both interfaces: the bung-to-vessel opening and the airlock-stem-to-bung hole.
Also check
Compare chamber construction with a three-piece cylindrical airlock when deciding which format you prefer.
Documented use & care
Fill with water and keep the cap fitted as instructed by the supplier. No exact fill volume, detergent or heat limit is transferred from another maker’s airlock.
Connections & scope
Fit and useful limits
- Universal-style does not establish every vessel or grommet fit.
- Structured 3.15 in length versus graphic 6.56 in height and differing widths are not a settled assembled envelope.
- No oxygen-proof, sterile-result or numerical pressure-monitoring promise is made.
Questions about this product
What else should you know?
Can I reuse the bung from another airlock set?
Match the actual stem and drilled passage before mixing sets. The universal-style bung supplied here is not a documented interchangeability claim for every other airlock.
Does this show an exact pressure reading?
No calibrated pressure scale is established. You can observe the liquid chambers and gas movement, but this does not replace a pressure instrument or liquid-gravity measurement.
What if I only need a stopper for my existing airlock?
This offer supplies both airlocks and bungs. Compare a separately sold stopper by the vessel opening and stem passage; do not choose a different stopper number solely to obtain fewer spare parts.
A different choice for a different need
Compare the relevant alternatives
Acellegic Number 10 Drilled Rubber Stoppers, Six Pack
Compare the separately sold number 10 drilled stoppers only if their dimensions match the opening you need to close.
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