What is the main reason for the increase in urine volume after drinking a large amount of water

Water is the best diuretic, because after drinking a lot of water, antidiuretic hormone secretion in the body immediately decreases, urine volume begins to increase. Drinking a lot of water, plasma crystal osmotic pressure decreases, resulting in hypothalamic supraoptic nucleus and its surrounding osmotic pressure receptor stimulation weakened, antidiuretic hormone decreased, distal convoluted tubules and collecting ducts of water reabsorption decreased, original urine increased, to renal tubular urine precipitation, resulting in increased urine volume, so water is the best diuretic.