I know that this may be the wrong forum but I have always believed that sparks were infinitely more intelligent than our plumbing cousins. Any way, I have the most disgusting growth pervading my copper domestic hot and cold water system. It does not affect the drinking water. The system is gravity fed from a plastic tank in the loft. There is no evidence of contamination, fauna etc and the tank has a lid. I have poured quantities of fairly strong bleached in to the tank and flushed it through. The water is a muddy light brown. Any ideas that might help me.
Many thanks.
[This message has been edited by lyledunn (edited 10-01-2004).]
