Iirc kidney rate is 0.8-1L per hour, so at 20L/day the person would be fairly likely to hit hyponatremia rather quickly. Weasel words included because they're

Iirc kidney rate is 0.8-1L per hour, so at 20L/day the person would be fairly likely to hit hyponatremia rather quickly. Weasel words included because they're necessary... Health is complicated