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Old 04-23-2004, 07:30 AM   #1
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RO/DI filter and higher PH levels


I noticed that water filtered through my RO/DI unit has a higher PH than my tap water. My tap water has a PH of 7.9. After running it through my RO unit it becomes 8.9. I have tested with liquid tests and a digital PH tester with identical results.

I am using the AquaFx Barracuda RO/DI Filter.

Is this normal?



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Old 04-23-2004, 09:14 AM   #2
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No, it's not normal. The ph of RO/DI water should be around 6.5-7.0 depending on the quality of water going in. What is the TDS of the product water? Is your digital ph meter calibrated to read ph that low?

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filter, level, ph level, ph levels, ro/di

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