I'd try gutter thermal tape. Not pipe tape. There is a difference.
I was out of town for 2 weeks and I left the water on to my pig stall watering can. It was subzero for highs during most of that time and my neighbor who was feeding them said the water was still flowing out of their drinker no problem.
I was out of town for 2 weeks and I left the water on to my pig stall watering can. It was subzero for highs during most of that time and my neighbor who was feeding them said the water was still flowing out of their drinker no problem.