This is a one opening unit with a roll-away ball closure. It keeps the water fresh and keeps outside elements out. It is constantly circulating. There is extra insulation around the valve area to keep from freezing as well as 2'' to 3'' of urethane insulation to help prevent freezing. This does not come with a heating unit.
Capacity: 75 Head of Beef, 30 Head of Dairy
Size: 30 Gallons
Opening Size: One 10'', 10.75'' Ball
Drinking Height: 18''