This is a dual filter. There are 5 levels in total. After filtration, the water is as fresh as spring water. This filter is easy to install. No plumber required. I can do it myself. When you turn on the water for the first time, it is normal that black substances flow out and some water drips from the filter tap. No more drips after a few uses. This water filter is very good and I recommend every household to have one so that every family member can drink fresh water every day and be healthy. I'm sure you would love it!
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