Automatic shutoff and reliable water level control for RO systems and fish tanks. This 1/4inch float ball valve automatically stops flow to prevent overflow and water waste, reducing manual intervention in home plumbing setups. Easy installation and compatibility Quickconnect design fits standard 1/4inch OD tubes and installs without tools. Suitable for DIY enthusiasts and aquarium hobbyists seeking a straightforward solution. Durable construction and performance Made from PP material for longlasting use. Withstands pressures from 0.02 to 0.8 MPa. Offers erosion resistance for consistent operation in various water applications. Flexible sizing options Available in big ball (73 mm) and small ball (55 mm) styles for flexible adjustment to match different tank sizes and water flow needs. Specifications Valve size: 1/4inch float ball valve Material: PP Pressure range: 0.02–0.8 MPa Quickconnect: fits standard 1/4inch OD tubes Ball sizes: big ball 73 mm; small ball 55 mm Applications Use in RO systems to autofill reservoirs and prevent overflow. Maintain stable water levels in fish tanks to reduce spills and manual topping off. Suitable for other small water storage or DIY projects requiring simple, tool installation and reliable shutoff.