It is a long time since I installed my central heating plumbing and since then lead-free solder has become the norm. I now want to add an extra radiator. What type of torch do I need to use lead-free solder satisfactorily?
You do not need any special equipment to cope with lead free solder. It acts almost identically to traditional solder.
I found the only difference is that where lead solder can, with careful heating, be held at a point where it is quite viscous. Lead free tends to change straight from a solid to a thin liquid and therefore cannot be encouraged to "build up" and fill larger gaps.
If you only need a blowtorch to do a few jobs, just stick to a cheap propane model with a thinnish nozzle.
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