Automatic mechanical water level controller that stops water flow when a set level is reached. Simple to fit, fully automatic in operation, and designed to work without external power. Key benefits Prevents overflow by automatically shutting off the water supply when the control position is reached. No external electricity required thanks to the internal swimmer float mechanism. Easy to install on standard fittings and ready for immediate use with included accessories. Suitable for a wide range of pressure and temperature conditions for reliable performance. What it does Internal swimmer closes the valve at the preset water level, stopping the feed automatically. Fully automatic water level control reduces manual checks and helps conserve water and energy. Compatibility and contents Standard male threads for installation into a standard female connector. Includes adhesive tape, a 1/2 inch L elbow, and a 1/2 inch to 3/4 inch adapter for common plumbing configurations. Performance and limits Operating pressure range: 10 PSI to 150 PSI. Operating temperature range: 0 C to 100 C. Practical use scenarios Domestic rooftop or overhead water tanks to prevent overflow when the tank reaches the set level. Rainwater harvesting storage or cisterns where automatic shutoff is needed without electrical supply. Small agricultural or livestock tanks where a simple, reliable mechanical control is preferred. Installation notes Fits standard female threaded connectors. Use the included adhesive tape on threads to ensure a secure, leak connection. Use the 1/2 inch L elbow and the 1/2 to 3/4 inch adapter as needed to match existing pipework. Materials and function summary Mechanical float actuator controls valve closure at the set water level. Designed for straightforward replacement or retrofit on compatible plumbing with standard male threads. This product provides a straightforward, power solution for automatic water level control, compatible with common household and smallscale water systems.