Best Reverse Osmosis System 2021: Top Picks, Reviews & FAQ
2021-10-23u2002·u20021. 5-Stage Filtration. The iSpring RCS5T has the same 5-stage filtration process as the smaller under-sink iSpring RO systems. They include a sediment filter, two carbon filters, a reverse osmosis membrane and a carbon post-filter. The RO membrane has a unique dual flow design that draws water from both sides.
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