Increased Water Flow: The water will automatically shut off when the water is full, and the water flow rate is increased by 20% compared to the traditional flow rate. A variety of sizes are available: 1 in, 3/4 in, 1/2 in, three sizes can be selected to meet your different needs. Safe Nylon: The automatic float valve is made of food-grade environmental protection nylon material, safe and harmless. Stainless Steel Nuts: The water level control valve adopts 304 stainless steel fixing nuts, will not cause secondary pollution to drinking water due to rust. Wide Application: The automatic float valve can be used for automatic water replenishment in water tanks, water towers, solar water heaters, etc.