J. Waters says
"Has anyone ever wondered why we need to test geysers to SANS 151? In the past four months, I have met three importers of fixed electrical water heaters who don’t understand “why 151 when we have 60335?” if you look at SANS 151 carefully, the whole standard relates to the make-up of the material from which the tank is made, its structural integrity, its components and its protection against corrosion etc. Oh yes and electrical safety. So in order to get a conformity to SANS 151 you need to have IEC 60335-2-21 which applies to Electrical safety. This does not apply in reverse. The best thing for anyone who considers importing any water heating system is to speak to the people who know, SABS. This does not only apply to water heaters, but all components used in the installation of plumbing systems. And to all those who say that European, Australian, Asian and American standards are superior to SANS, take your stuff back to where you got it, or make sure that they comply, this is our industry and if you don’t want to fit in...... leave!!"