SteveUK said:It depends on your water pipes mainly. I think it has something to do with hot water sitting about longer in the pipes/boiler/tank and having more copper loaded into it. If you're off a newer combi boiler it shouldn't be a problem (heats from the cold water supply on the fly.
That's what I've been told anyhow...
Egmel said:I seem to remember that new copper pipes were possibly likely to cause a problem but once they'd oxidised you shouldn't need to worry. Especially in hard water areas where most of the pipe is likely to be coated with limescale anyway!
Not sure on the reality though, I suppose you can't tell with out doing an analysis of the water coming out of your tap.
Themuleous said:Mains water doesn't go through copper piping as far as I am aware. Plastic these days or clay and even still lead in places. Copper would have been to expensive I would have thought for mains water.