An isothermal water pump does not require electricity, so the energy cost is zero for you! Extensive testing on livestock farms for many years has shown that isothermal trough can withstand harsh weather conditions down to -30C (-22F) without an external heating source. The isothermal trough has a solid design that can withstand any abuse that the animal might cause. The float system seals the water from the outside. Thus, when animals drink, the amount of water is immediately replaced by the valve system inside the trough. All assembly components are included. 40L Capacity