What is the lifespan of a Black Berkey filter?

The quantity of filter water from a filtering element "Black Berkey": 11350 liters with tap water and up to 4 times less with "recovered" water

Lifespan of 2 filtering elements: Let us take an example, at the rate of 12 liters of daily filtration with tap water we obtain a duration of approximately 5 years (and 1 year and a half to 5 years with water recovered according to the quantity of impurities).
An abnormally high limestone level can considerably reduce the life of filters "Black Berkey" filter elements
Average filtration cost: 0.00675 euros per liter (lifespan of the pair of filter elements "Black Berkey" of 22,700 liters).

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