I have ordered these Aquacrest filters several times now in 4 packs and they actually outperform the Zero Water OEM filters as the AC filters have two exits and the water literally flows through the filter about twice as fast - the filters hold longer. same length or longer than ZW OEM filters. YES On the ZW and AQ filters, the first pair of water jugs will have residual carbon filter dust that was displaced in the filters during shipping - after the second filter is filled the TDS counters will always read zero. Why did I write this 5-star recommendation? Because ALL NEGATIVE NEGATIVE reviews here are pure NEGATIVE SEO LIES written by lying reviewers with a clear agenda against AC and Pro ZW. I hate liars. ZW filters are expensive - AC filters are a third the price, work great, and filter tap or well water much faster with a TDS 000 value, just like ZW filters give the same raw water value. In my city's tap water, TDS levels in New England, USA, range from 135 to 170 ppm. After the AC filtration reading reaches 000, your source water readings are likely to be different.
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