Can confirm that it only works with a valve cartridge adapter, as the thread is missing on Campinggaz cartridges. However, the adapter at Transa is not from Primus, so first confirm that it works with the Kinjia. By the way: The Kinjia is great. We have been cooking with it as a family of 5 for a few weeks.

No, these are different threads. But there are adapter sets. For example, from Transa. For the use of the larger Campinggaz bottles, it is also recommended to fit a longer connection hose. This is also available as a spare part. To replace it, however, you have to dismantle the cooker housing. That is quite fiddly.