Float Valve by Hudson Valve Company, Inc. No lever arm No exterior moving parts Resistant to freezing Indestructible Installs in seconds No float ball High volume Anti-siphon Rust-proof materials Pet supply for livestock watering care 1 Valve 1 inch (25.4 mm) Thread Female 1.0 in, Height 5.0 in, Diameter 3.75 in, Operating Pressure 4-100 psi, Flow Rate approx 80% of flow supplied to valve, Max Fluid Temp 175 degrees fahrenheit Style V-1 The unique patented design of the Hudson Valve uses fluid pressure, as opposed to a lever arm and ball, as the force to close the valve. This compact, self-contained design greatly enhances the valve's reliability. The valve body is made of durable glass-filled nylon 6/6. Internal parts are of ABS plastic, silicone, and stainless steel. When properly installed, the valve will meet anti-siphon requirements.Hudson Valves are used in various applications as: Aquariums, Car washes, Evaporative coolers, Fountains, Grounds maintenance, Holding tanks, Irrigation systems, Landscaping, Livestock tanks, Ponds, Swimming pools and much more.The Hudson Valve is very easy to install. It can be installed directly onto your existing plumbing or you can use a Hudson Mounting Bracket and a standard garden hose.The unique patented design of the Hudson Valve closes the valve with water pressure. The small compact size of the valve means it can fit into tight spaces and in applications where aesthetics matter, it can be tucked away almost out of sight.