I use a Rothenberger Super Fire 2 torch for my silver soldering and annealing. The torch is about 4 years old, and yesterday, when installing the cylinder, gas vented from a small hole in the body. Tried another cylinder, exactly the same.
I contacted Rothenberger UK and was told it's irreparable and the leakage was caused by erosion from the use of aftermarket gas (non-Rothenberger), or by leaving the cylinder attached after use, which I haven't.
Anyone come across this before? The obvious thought is that Rothenberger want me to buy their gas, but I'm not sure.
There seem to be any number of aftermarket cylinders available from plumbers merchants, so if that's the case, it ought to be a common problem.