Monkey see, monkey do!

As far as potty training goes.. consistancy is the key. The first few months are very stressful and it seems like they're just never going to learn. Then one day its like a light switch goes off in their head and THEY GET it!

If he is drinking THAT much water, that's why he potties in the house so much! Limit his water intake so he won't drink as much and therefore won't have so many accidents. You NEED to get him on a potty schedule (if you haven't already) and bring him outside every 1 1/2 to 2 hours on the dot. Once he gets used to this he can start training his bladder to be able to hold it longer and longer.