My partner has become poorly with colon cancer So i considered the need to filter our water. I believe with the rise of this type of cancer there is something wrong. I believe we are drinking too many microplastics. Even if this isn't the cause. Filtered water can only be a good thing Ive researched different filters . There were a few from the usa but they are not tested to a high standard like the uk . I wanted something simple and well constructed. The Berkefeld Gravity System meets ticks all the boxes