Well I got home a little bit ago and I went to play with the water system, I tore down an extra nipple to see how the internals were and worked... I ran my finger across some that are hooked up and noticed they are fine the way they are lmfao!! I thought the rats literally has to push in the needle 🤣🤣🤣🤣 guess not as long as they move it or hold it to one side cause the water sure starts flowing!!!! But you can loosen the brass nipple a little bit to make it easier to move from side to side (food for thought) but I even saw one of the almost weaned rats drinking from it so that’s good to know that I don’t have to really have any losened up.... sometimes I wish there were descriptions on a products page as to how they truly function, especially when they say “take your time and adjust them properly”. I was really nervous that the rats were being deprived of water