We have a 150gallon metal tank--it's actually a physical therapy water tank. Jeff is building an insulated box for it. Inside will be a pump, and a stock tank de-icer. It's a closed system, that will keep moving, and I'm hoping the de-icer will keep it at an adequate temperature. If we absolutely have to we'll wrap heated tape around the pipe on the end farthest away from the tank to encourage things to stay moving. The barn is partially insulated as well. We got the horizontal nipples so they won't freeze open like the vertical ones do. I'm definitely out there a lot anyway, but right now the water situation isn't actually working at all. The waterers we have keep dropping the bottoms out, or breaking, and they continually poo in the open rubber buckets we have on the ground. It's something like 20 gallons in and out several times a day for me right now. The thawing waterers are in the back hall, and I carry down five gallon buckets. It's not horrible, but it is avoidable. And I'm so excited for this.
Every two pens have a shut-off/bypass valve, and there's another pump bypass valve if we need to fill buckets from the tank or turn everything off and drain it in case the electricity goes out during the winter. There's even going to be a small run of pipe into the brooder room! We have eight small pens, 6x10 down one wall; and two larger ones that are 24x10, and the brooder room across the aisle.
I'm going to try to get a video up, and at least a blog post, and I'll share here when we get everything done!