Automatic Control: The upgraded water level control valve is fully automatic control and no charging required. More stable and sensitive: Small size but high flow rate, more water output than conventional floats. Eco-friendly and Durable: The valve is made of food-grade plastic for drinking water pipes and 304 stainless steel screws, anti-rust, corrosion resistant, and longer life used Perfect Replacement: The valve replaces the traditional float valve and also easy to install, built-in installation, low failure rate, and save water resources. Wide Applications: Can be used for water tanks, water towers, swimming pools, toilets, animal drinking water, humidifiers, civil buildings, etc..