FarmerPhronc
Chirping
The nipple valves don't work well at high altitudes like Colorado because there's not enough air pressure for the valves to work properly.
I live in Colorado and have no issue with nipples working here. This is the waterer and feeder that came with the coop I purchased.
I use an API 250D 200-Watt Pail and Birdbath De-icer with Guard and 6-Foot Cord to keep the water from freezing, so far so good.
The only issue I have is that the vertical nipple seems to freeze up in cold weather so I'm replacing it with a horizontal nipple. My understanding is they are less likely to freeze up... time will tell.