Having now got some fire bricks and made a small hearth I've been silver soldering a small boiler. The propane torch I have came with three nozzles,
10mm 14mm 17mm. I am using the 17mm nozzle and have done part of the job without too much difficulty, but when it came to soldering the ends on I didn't seem able to get enough heat in. Do I need to get more bricks round the part too keep the heat in, or should I think about some larger nozzles (they also do 25mm 40mm 50mm sizes). This boiler is only 1.75" diameter by 6" long, most other projects I'm planning will be bigger than this.Regards
Kevin