Plumbing irons are an electric hand-held tool, designed to be used in place of a blow torch for heating up copper piping.
Plumbing irons heat pipe work using an electric source, so there is no need for a naked flame e.g. copper pipes which lay in between floorboards.
Plumbing irons are an excellent choice for soldering in tight and confined spaces. They use converted mains power to heat up the pipe and therefore have no open flame like a blow torch, which could possibly set surrounding materials on fire.