Tozan
Chirping
For other people who use a nipple type or other trigger type watering tank that are prone to sticking or leaking and you want to limit the possibility of flooding the coop you can attach a fill hose to the tank and put a sprinkler (irrigation) timer on it so it only comes on for a few minutes every hour or when you want it to. That way if you have a sticking valve it will limit the amount of water that floods the coop but your birds will still get water.