Fully automatic water level control valve DN-25 provides automatic water level control for tanks, towers, swimming pools and other compatible vessels, ensuring precise level maintenance. Easy installation and operation - Compact size allows quick and hassle free installation - No complex wiring or power supply required - Flow performance up to 3 gallons per minute at pressures up to 40 psi Energy saving and reliable - Does not require electricity to operate - Long service life with a low failure rate - Helps reduce operating costs and conserve resources Environmentally friendly - Made from safe materials - Does not emit harmful substances - Supports a clean and efficient water control system Key attributes - Function: fully automatic water level control - Compatibility: suitable for tanks, towers, pools and similar applications - Size: DN-25 - Material: safe materials - Performance: no power required; flow up to 3 GPM; operating pressure up to 40 psi Typical use scenarios - Maintaining water level in storage tanks for residential or commercial facilities - Automatic refilling in elevated water towers - Maintaining pool water level during fill and evaporation cycles