Refillable 12 gram CO2 capsules

[jackssmirkingrevenge]

Found these diagrams during an unrelated search, I remember there had been some discussion about converting CO₂ capsules for re-use so they might be of interest. Some good regulator ideas too.

[warhead052]

Wow, those look so easy I could probably do it.

[Technician1002]

The problem with CO2 is it's expansion with temperature. If the cartridge is overfilled and it does not have a proper pressure relief, it will fail in a spectacular fashion. Commercial cartridges have the seal that will blow out when overheated. They are also filled by weight. Most home users do not have the tools to inject a metered weight of CO2 into a cartridge. This makes it not so safe.

[jackssmirkingrevenge]

Tech, these are meant to be refilled with air as a substitute for buying disposable 12 gram CO₂ cartridges, rather than refilled with CO₂

[Fnord]

I never thought about it before, but when I read your post I thought "hmm... I wonder if you could just tap schrader threads into the inside of the neck. Seems like a suitable inside diameter...".
So yeah, I guess we all think alike around here