Installed about two weeks ago, these filters are as easy to swap out as any we've bought in our 15 years of reverse osmosis system experience. Since the device must be removed from its place under the sink before changing the filter, this work is never quick. These filters are efficient and very economical compared to others we have used in the past. My home water, supplied by our city, measures a TDS of 208 ppm. After passing these filters, my TDS is 22ppm. Satisfied with the result, as well as the price and the fast delivery.
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