@david I use one of these https://www.fruugoaustralia.com/co2-cylinder-adapter-for-sodastream-tr21-4-male-thread-to-g12-type30-female-thread/p-312688311-698157910?language=en&ac=google&...
@david I use one of these https://www.fruugoaustralia.com/co2-cylinder-adapter-for-sodastream-tr21-4-male-thread-to-g12-type30-female-thread/p-312688311-698157910?language=en&ac=google&...