2pcs Automatic 1/2 Inch 20mm Float Ball Valve for Aquarium

The use of the water level principle of the floater controls the inlet and outlet water flow, achieving a constant water level effect, preserving sufficient and always providing clean water. The floats are always submerged; as the water level rises, they follow the rise. The rod, pulled by the rising water, also rises. High water flow, high efficiency, good sealing. Works very well. Suitable for watering troughs, humidifiers, fountains, aquariums, ponds, chicken/dog/horse/cattle waterers, etc. The rubber washer ensures a watertight and leak-proof kit, and you can easily adjust the aerator arm. Item Descriptions: Using the principle of a constant water level, the aerator controls the inlet and outlet water switch to achieve a constant water level effect. Provides sufficient and always clean water. Floats remain submerged; as the water level rises, the floats follow the rise. The stem, pulled by the rise, also rises. High water flow, high efficiency, good sealing. Works very well for drinking troughs, humidifiers, fountains, aquariums, ponds, chicken/dog/horse/cattle waterers, etc. The rubber washer ensures a Waterproof and leak-proof kit, and you can easily adjust the float arm. Float ball size: 95x50mm/3.74inx1.97in Working temperature: 0 degrees Celsius-70 degrees Celsius Package: 2x 1/2 inch float ball valves Item Specifications: Model: DN15 Material: ABS Thread: 20mm Apply pressure: 0.01-1.2 MPA Flow direction: Unidirectional Brand: Unbranded/Generic