pH of new water

[Troy F]

I have not very big knowlege to backup this Troy but if the TDS of water is 0 ppm we should have all the same PH at the end with any kind of Tap water

<font size="2" face="Verdana, Helvetica, sans-serif">That's completely true Stephane, I overlooked that :confused: . I think the variable lies in the 0ppm of the purified water and the test results.