Features: When the water level is below the valve level, the float valve automatically replenishes water into the tank, tower, or animal drinking container. Once the desired water level is reached, it automatically stops filling, closing as the water lifts the internal float. This valve replaces traditional ballcock valves, requires no electricity, is easy to use, has a long service life, low failure rate, and helps conserve water. Widely used in water tanks, water towers, swimming pools, solar heating systems, toilets, hot water boilers, animal watering systems, air coolers, humidifiers, residential buildings, cooling towers, steamers, and similar applications. The internal floating ball mechanism allows water flow until a set level is achieved. As the water rises, buoyancy lifts the float, shutting off the water supply. When the level drops, the valve reopens to allow flow, operating entirely without electricity. Ideal for maintaining water levels in garden waterfalls, fountains, rainwater harvesting systems, swimming pools, poultry farms, automatic livestock watering systems, drought-resistant watering solutions, and outdoor rainwater collection containers. Package Includes: 1x Automatic Water Valve Specifications: Material: Plastic + Rubber Size: As Shown Type: 6 Types Optional Note: 1. Please allow 1-2 cm variation due to manual measurement. Ensure you are comfortable with this before ordering. 2. Due to differences in monitor displays, the image may not accurately represent the actual color of the product.