>the distilled water is
>forced through the membrane- this saves $ because the membrane tanks
>otherwise need regular service and recharging.

If running tap water can do this to these tanks over the course of what, a
month???, then what can tap water do to our vanagon over the course of a
year.....  and thousands of miles.....

Even if its only a little corrosion, it's accumulative, and the only way you
can reverse the corrosion is to pull the heads...

If we're going to err on the side of safety and longevity...

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