1: The automatic floating ball valve controls the water inflow, which is self-sufficient in case of water shortage, and automatically stops the water inflow when the water is full to prevent dry burning damage. 2: The box and plate are made of high-quality stainless steel, which is not easy to rust and is more durable. 3: The overall polyurethane foam insulation is adopted for heat preservation, which is more energy saving, heat insulation and environmental protection. 4: Adopt