For many years we have bought replacement filters for filters that have worked well. Switched to them as they were cheaper and our original filters were out of stock. It's not the same. They last from 2 weeks to a month. Our water consumption has not changed. After 2 weeks, cold water will become drop-shaped and the sink can no longer be used. Although they are cheaper than a filter, their shelf life is no more than 6 months. We threw away the last 2 filters after only 2 weeks of use each. Now we will buy a new filter system.
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