Limescale is the hard, off-white, chalky deposit found in kettles, hot-water boilers and the inside of inadequately maintained hot-water central heating systems. It is also often found as a similar deposit on the inner surface of old pipes and other surfaces where `hard water` has evaporated. In addition to being unsightly and hard to clean, lim.....
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http://en.wikipedia.org/wiki/Limescale
Limescale is the hard white-ish chalky deposit found in kettles, hot water boilers and the inside of inadequately maintained hot-water central heating systems. Mildew is also found on surfaces where hard water has evaporated.
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http://www.encyclo.co.uk/local/20712
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