your kidneys process 15 litres of fluid each day drinking 4litres of water wont over do it in the slightest, unless u drink alot of that four litres straight after exercise with out putting some salt in it.
Out of interest how many pint to a litre? Lol, i put a tiny bit of squash in a pint glass and fill to top with water, but wondered how many of these i would have to drink to get to the 2 litres i require a day? lol, yesterday i used my old pop bottle 2 litre one, put a bit of squash in and just drank that for the whole day!
I've just started my water drinking for today as of 20 mins ago. Banged my head quite hard this morning and lost my appitite, but its back now so will drink drink drink