This adapter is designed to allow the use of 7kg or 15kg butane cylinders with a 21mm clip-on outlet, as well as propane cylinders such as Calor 11kg. It is specifically intended for use with caravans that have a 30 mBar fixed bulkhead regulator with a propane or butane pigtail fitted. The clip-on adaptor screws onto the end of the pigtail, allowing it to be connected to the larger butane cylinders that require a clip-on fitting. The adaptor is used in conjunction with the Butane Nut x W20 pigtail.
