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Message: [QUOTE="DirtMechanic, post: 227316, member: 5568"] I am gonna have to adjust that distilled water opinion value down a bit bro. 7ph may be inert, and thus suitable as treated water to move through my copper pipes, but acids eat metal and that is why the electrically neutral 7 pH is useful in our water systems. Metals are madly toxic. No need to have them dissolve and enter our bodies via our water pipes like the lead ones in Detroit or even ancient Rome. Copper is being banned in the UK as a fungicide that builds up in the chalky high pH areas. Were it dissolved like my acid clay could do for it, copper would leach down with rain, and in a far future somebody might mine it as a deposit. 7 pH is definitely electrically neutral, but distilled water has to have additives such as they use in the public water treatment systems here to raise the pH up or we suffer either a degradation of the metals in the supply system pipes or a loss of enamels in our teeth or substance in our bones. I think rain and distilled are mother natures middle ground and I am fascinated that it is slightly acidic at 6pH. [/QUOTE]