> Your kidneys can eliminate about 5.3-7.4 gallons (20-28 liters) of water a day, but they can't get rid of more than 27-33 ounces (0.8-1.0 liters) per hour.
https://www.medicalnewstoday.com/articles/318619.php
Also, you don't need 8 glass of water a day, that is a myth, you should listen to your body[1].
[1] https://www.nytimes.com/2015/08/25/upshot/no-you-do-not-have...