I reside in Central Virginia. We do get into single digits at times in the winter and definitely below 32 F.
I don't see how the Solway auto watering system can't freeze below 32 F. All standing water should. If you're saying it doesn't....man, I gotta understand this magic. The water in the down tube for sure. Please advise what you're saying on the no freezing because this can't be possible without a heater.
Ah, yes, I was assuming you would be heating the water somehow. Yes, if it gets below 32F, you need to heat it, no matter what the system. With the vertical nipples I had to heat it with an aquarium heater to 68F (lowest setting) to keep the nipples from freezing up to -9F. I don't know if it actually had to be that warm, but it was the lowest setting I could set the aquarium heater for. The V nipples would freeze up with the stock tank deicer, but the water in the bucket itself would be ice free. With the horizontal nipples (being a different design) I think I can now use my stock tank deicer, which only heats the water to 40F. I have read from many others that the H nipples don't freeze up as easily. It also seems to be a more natural way for birds to drink, more similar to the cups.
Search the forums for freezing and watering cups, you'll find plenty of posts saying that the cups don't work as well as the V or H nipples in freezing weather, especially not into the single digits. I wanted to try the cups, but am glad I found out beforehand and wasted time, money and a bucket.
Another note on the vertical nipples...I have both bantams and large fowl using the same waterer. The bucket was either too high for the bantams or too low for the LF. So I had to keep it in between so the bantams can reach it. The downside of this is the bantams would get rather wet when they drink and the area under the bucket was always wet, which could (in a less arid climate than I live in) really cause some toxic mold problems. I've read from those who have tried both the V and H nipples that there is virtually zilch wet/dripping issues with the H nipples compared to the V ones. I just installed them but I can already see why.
Btw, I don't use any sort of auto watering system. 5 gallons for 12 birds is more than enough, lasts a week or more, if we were to go out of town for longer than that, I would just have the person picking up the eggs fill the bucket while they were there. We also don't have easy plumbing access to our coop and I'm not interested in digging a ditch just to save a few minutes once a week
