Hi, about a month or so ago, I went to a local supplier to get a refill in exchange for my 3.9 Kg one and was told there was a real big shortage for them, had to go back next day and exchange a 19 Kg one instead. They can only exchange like for like, if you want a different size, it's a new purchase, and has always been that way since I've had any many years ago.
Regards Nick.
Edited By Nicholas Farr on 22/10/2021 21:28:42