Re: Tap water or distilled water in coffee machine?
OK, time for me to jump in with a few comments.
As previously stated when this and similar discussions have occurred terms really must be defined. Despite several comments to this effect here yall have not done this. Hence youre most likely talking about different things when using the same terms.
For purposes of this discussion Reverse Osmosis (RO) water refers to RO water produced with over-the-counter home RO units.
Reverse Osmosis (RO) water != Pure water
Reverse Osmosis water (I suspect the same is true for most Distilled, and De-ionized waters available to home users also.) is not pure water! There-for any discussion of the effects that pure water have are meaningless when discussing RO water!
Pure water = H2O [b]With nothing else present in the solution!
The RO membrane will remove (most) dissolved solids. Among other things it does not remove dissolved gases! Ergo RO water is not pure water! Therefor any discussion of the reactivity of the H2O molecule is only part of the equation of the reactivity of RO water. To claim that RO water is non-corrosive/reactive because the H2O molecule has no free ion(s) is at best an uninformed comment and at worst disingenuous.
So, with all this said is RO water bad for pipes and boilers made from such things as copper and brass and therefor bad for espresso machines? Yes.
Java "Definitions matter!" phile
OK, time for me to jump in with a few comments.
As previously stated when this and similar discussions have occurred terms really must be defined. Despite several comments to this effect here yall have not done this. Hence youre most likely talking about different things when using the same terms.
For purposes of this discussion Reverse Osmosis (RO) water refers to RO water produced with over-the-counter home RO units.
Reverse Osmosis (RO) water != Pure water
Reverse Osmosis water (I suspect the same is true for most Distilled, and De-ionized waters available to home users also.) is not pure water! There-for any discussion of the effects that pure water have are meaningless when discussing RO water!
Pure water = H2O [b]With nothing else present in the solution!
The RO membrane will remove (most) dissolved solids. Among other things it does not remove dissolved gases! Ergo RO water is not pure water! Therefor any discussion of the reactivity of the H2O molecule is only part of the equation of the reactivity of RO water. To claim that RO water is non-corrosive/reactive because the H2O molecule has no free ion(s) is at best an uninformed comment and at worst disingenuous.
So, with all this said is RO water bad for pipes and boilers made from such things as copper and brass and therefor bad for espresso machines? Yes.
Java "Definitions matter!" phile




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