It doesn't look like a banded to me. To me, it looks like a red bellied water snake, nerodia erythrogaster. The pattern looks wrong for fasciata but it lines up perfectly with erythrogaster. Banded water snakes also usually have SOME kind of marknigs on the stomach. Red bellies have a clear, unmarked belly. It also explains the red you blushing you are seeing a long the sides. Fasciata can have red too, but it is different, it's situated inside their bands and it goes up, and it is a clear red color, not blushing. As this snake matures it will lose the pattern and turn a solid reddish brown color with a red stomach. I have two... neat little snakes!