Float Ball Valve — Portable Automatic Fill Valve (1.27 cm / 1/2 in) Key benefits — why you need it Automates water level control to prevent overflow and eliminate constant manual monitoring. Compact and portable design lets you move and use the valve in different tanks or systems as needed. Robust sealing and large flow capacity speed up refilling while minimizing leaks and maintenance. What it does and how it solves problems Automatic filling: Designed for automatic filling and suitable for use as a replacement part, the valve opens and closes with the float to maintain the desired water level. Reliable shutoff: The valve closes the water flow for a 1.27 cm (1/2 in) opening, providing consistent control of inflow. High flow, good seal: Engineered for a large water flow rate so refilling is efficient, while a dependable sealing mechanism reduces the risk of drips and water loss. Key features and specifications Compatibility: Thread size 1/2 inch — fits common household and small commercial water systems. Size: Controls water flow for a 1.27 cm (0.5 in) opening. Materials: Made from durable plastic and PE (polyethylene) for corrosion resistance and long service life. Portability: Lightweight design enables easy relocation and use in multiple applications. Easy installation and flexible operation: Simple to mount and adapt to different setups without specialized tools. Practical use scenarios Garden and koi ponds: Automate topping up pond water after evaporation to protect fish and plants. Fish aquariums: Maintain stable water levels in tanks, reducing stress on filtration and aquatic life. Water storage tanks: Keep household or remote tanks at the correct level without frequent manual checks. Durability and maintenance Built from plastic and PE for long-term use in wet environments. Simple construction makes routine inspection and replacement straightforward. What to expect A portable, easy-to-install float ball valve that fits 1/2 inch threads, manages a 1.27 cm water opening, and delivers efficient, sealed automatic filling for ponds, aquariums, and water tanks.