【Automatic Operation】The float valve automatically fills water tanks, water towers, animal troughs, and livestock waterers when the water level is below the valve. It automatically stops filling once the water level reaches the valve and closes when the water level reaches the internal float. 【Easy to Install】This mini float valve features a compact ball valve for easy installation. Its 1/2-inch external thread is compatible with most BSP threaded fittings. If your thread is NPT, simply add PTFE tape for optimal operation. 【No Power Supply Required】The integrated float valve allows water to flow to a specific level. Once this level is reached, the float valve is pushed upwards by the water, stopping the flow. When the water level drops, the valve opens again and the water starts flowing. Therefore, no electrical power is required. 【Widely Used】It is used to maintain the water level in garden waterfalls, courtyard fountains, garden gutters, for the automatic closure of swimming pools, chicken coops, automatic chicken waterers, etc. It is suitable for watering livestock in arid areas, outdoor rainwater harvesting systems, etc. 【Operating Water Pressure】The operating water pressure of the float valve is between 10 and 150 psi. Water pressure that is too low or too high can render the float valve unusable, inoperative, or damaged. Operating temperature: 0°C to 100°C. 【Easy Maintenance】The float valve comes with a filter, which should be installed at the water inlet to prevent sand and stones from clogging it. Safe and Environmentally Friendly: The valve body and screws are made of stainless steel, a rust-resistant and very safe material. Tips: If you are using an automatic water fill float valve indoors, ensure that an emergency overflow system is installed. Any automatic water fill float valve can malfunction and cause flooding. It is best to set the water flow to the minimum to maintain an optimal water level.