my boy rods a drinker too. if there is water he will drink it . i cant take him in the fountain at the park any more cause he drinks the entire time. he loves the water but i have to cut down on how much he is in it. he'll pee the entire walk home from the park like every couple minutes. then when i come home he'll pee in the house. if i put him in the crate he creates a dogmade lake in there. he'll do that all day.
when i used to
take him to the park, people would always fill up the water bowl for him. i have to drag him away from it, and people would say "but hes thirsty" when i know that he'll be there all day if people keep filling it up. i only give rod water when he needs it, after walks or playing or if he paws at an empty bowl. other wise i'd have to follow him around with a bucket.
edit: although in the house hes not as bad. rod never seems thirsty he just keeps drinking. if your boy always looks thirsty may be you could mention to your vet. im no vet but isnt it usually a sign of liver problems.. or was that kidney. i was worried about it too but my boys not too persistant to always have water. may be he just has a bad habit to hit the bottle a bit too much