
After "cleaning" the new filter by filling the Zero Water jug reservoir and filtering the new filter for the first time, my TDS count was around 50. Then , five filters "Cleanup" took TDS lower, but still in double digits. I didn't filter the more expensive California water to see if it eventually reached TDS=0, which is what I get with ZeroWater filters. Of course, they have their own problems, which I won't go into detail in this review. I can try a second filter after my zero filter reaches TDS=6 in about 12-14 days. Update - tried a second filter on 7/10/21 with similar results. After reading some good reviews I came to the conclusion that there is a quality issue in the manufacture of this product. Unfortunately I have to resort to the expensive ZeroFilter product for the time being until another solution comes along.

NANPU Compressed Air Filter Regulator Combo: Brass Element, Semi-Auto Drain, 0-150 Psi Gauge, And More
21 Review

NANPU DFR-02 1/4" NPT Air Drying System - Double Air Filters, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl
20 Review

NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 Review

Filter under the sink Aquaphor Favorit ECO silver
20 Review