Not a direct fit. Joining CO2 distribution manifold to 1/4" NPT needs a 1/4 NPT feed on the manifold block. Sealing method, the real-world trap, and the exact part to buy.
Updated 05 September 2026.
Connect CO2 distribution manifold to 1/4" NPT
How to join 1/4" MFL or 5/16" barb ports and 1/4-18 NPT, and what stops it leaking.
Not a direct fit. Joining CO2 distribution manifold to 1/4" NPT needs a 1/4 NPT feed on the manifold block.
The two ends
- End A
- CO2 distribution manifold (1/4" MFL or 5/16" barb ports)
- End B
- 1/4" NPT (1/4-18 NPT)
- A seals on
- flare face or barb clamp at each outlet; 1/4 NPT feed taped
- B seals on
- on the thread flanks with PTFE tape or paste
- Part needed
- 1/4 NPT feed on the manifold block
The part to buy
Many distribution manifolds are built on a 1/4 NPT block, so the feed from the regulator lands on a 1/4 NPT port that is taped, while the outlets are MFL flares or barbs. The NPT feed and the flare outlets follow opposite sealing rules on one part.
Tape only the 1/4 NPT feed, because it is tapered and seals on the thread; never tape the MFL outlets, which seal on the flare face. Mixing these up, taping a flare or leaving the NPT dry, is the usual reason a fresh manifold hisses.
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Questions and answers
Connect CO2 distribution manifold to 1/4" NPT?
Not a direct fit. Joining CO2 distribution manifold to 1/4" NPT needs a 1/4 NPT feed on the manifold block.