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Aquasana AQ-4000 water filter

This model has been tested by our experts.


The Aquasana AQ-4000 is part of the Water Filter test program at Consumer Reports. In our lab tests, Water Filter models like the AQ-4000 are rated on multiple criteria, such as those listed below.

Lead removal: how effectively the filter removed lead in our tests

Chloroform removal: how effectively the filter removed chloroform in our tests

Flow rate: Time to dispense one quart of filtered water