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Singletoned | 5 years ago

No filter jug removes all the limescale in hard water areas. You still need a filter on the kettle

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ALittleLight|5 years ago

Why would a filter on a kettle remove what a filter on a jug doesn't?

developer92|5 years ago

A jug filter is much bigger and uses a different mechanism, a kettle filter is just a mesh to anything bigger than a large grain of sand in the kettle.

sneak|5 years ago

Because the concentrations in the kettle increase locally due to boiling, and there is precipitate that doesn't happen in the filter jug.