Clay has as one of its properties the heat exchange with the external environment, which allows the water temperature to remain up to 5° C (9° F) lower than the room temperature, in other words, always fresh. Therefore, sweating is quite normal on the external wall of the filter. If its maintenance and cleaning are done correctly, following the instruction manual, the filter has an indeterminate lifespan. Its replacement is recommended after 5 years of use. The lifespan is related to the quality of the water that is filtered and the maintenance that is done.