My OEM Rainsoft filters gave me 6ppm after flushing. time to replace. I ordered these filters, installed them and got 145ppm after several washes. The plastic on the filter is torn, I thought the problem was there. Gave them back for new ones. Installed, got 96 PPM after a few washes. Went back to the OEM filters and tested them at 25ppm (membrane filters had to be replaced) which stinks because they're $100. I think not all filters are created equal.
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