I know that when I used to take Urva ursi (kidney cleanse), I used to need to rush to the bathroom in order to prevent accidents and this was definitely due to the toxicity of the urine, not the amount for I would not pee that much.

However, if you lack electrolytes, the water is going to go right through you with being assimilated even. And you will pee plenty.
It is obvious that the kidneys are intoxicated and need to get rid of extra toxins, and therefore it is quite normal to drink plenty and pee plenty. I used to drink 4 liters of water a day. (And most likely pee just as much).
In order to make sure water does not just pass through you, a dash of lemon juice into your dink will insure the presence of electrolytest that help with assimilation of water.

There are different reasons depending on the cause.

A spastic bladder will make the bladder feel full when it is not.

Diabetes leads to frequent urination due to the body dumping glucose, which is very hygroscopic. So as the glucose is eliminated it carries water with it.

Drinking purified waters leads to more frequent urination since it enters the body at a faster rate. But too much water in the body is dangerous so the body tries to eliminate the water as fast as it can.

Green tea contains a small amount of caffeine, which is a diuretic.

Foods or drinks high in potassium are also naturally diuretic.

Stress can increase heart rate pumping more blood through the kidneys leading to more water removal. This also occurs when we are cold since blood gets shunted away from the skin to the organs.

And a lack of vasopressin (anti-diuretic hormone) also leads to increased urination. A condition known as diabetes insipidus.

...been puzzle by WHY I am tending to piss
a gallon a day. Been keeping a log for several
months trying to corellate it to..something.
Am plagued with fungus ..it's everywhere.
Always fungal threads in urine...sometimes
fuzzballs of tangled fungus in urine..small..but
troubling. Suspect the kidneys are being hammered
by fungus in blood. Have many pictures of threadlike
crap in blood...via microscope camera. Looks bad.
Twice blown off by doctors "objects are merely artifacts".
Great to know doc. absolutely NO curiosity from doc.
I look forward to a rather nasty "death by artifact".
..at any rate..urine full of thousands of tiny fungals..
near microscopic..but quite obvious even at modest
40 to 100x] magnification. Always a few
large fungal threads in the urin.
[sometimes really large..30 to 40 mm]
They are IN the urine..
means the kidneys are trashed with the crap.
It may be that the kidneys are trying very hard
to flush the fungals..resulting in endless urination.

I keep drinking..not going to let the urine get thick
for lack of water. Harvested 5 tiny stones so far..
very small..about 1mm. Harmless..so far..but a warning
of some sort . Suspect that heavy use of Bentonite clay
is building up a bit..slacked down from twice a day
Caproyl/bentonite to once a day. No vis stones in last
few weeks.

..the fungal seige continues.

yay.

sigh..

/