Re: Central Heating Boilers:
hard and soft water is not dictated by the acidity of it but both often go together. soft water has less salts than hard water.
for domestic tap water to corrode copper piping the acidity would have to be constantly under a pH of 2 which you would notice straight away if you drink it.
living in a hard water area is bad as it has a higher content of salts which build up in pipework etc.etc. soft water areas have no such problem.
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